All Calculators

Compound Interest Calculator

Calculate how your investments grow over time with compound interest.

Loan Calculator

Calculate monthly payments, total interest, and loan cost.

Mortgage Calculator

Estimate principal-and-interest mortgage payments, deposit-based loan amount, and affordability.

Mortgage PITI & Escrow Calculator

Estimate a US mortgage payment with principal, interest, property tax, insurance, PMI, escrow, and HOA.

UK Mortgage Total Monthly Cost Calculator

Estimate a UK mortgage payment plus council tax, insurance, service charge, maintenance, utilities, and affordability.

Investment Return Calculator

Calculate investment profit, total return, and annualized return over time.

IRR Money-Weighted Return Calculator

Calculate IRR, money-weighted return, NPV, and net cash flow from a manual cash-flow series.

Savings Calculator

See how your savings grow with regular contributions.

Debt-to-Income Ratio Calculator

Calculate your debt-to-income ratio for loan applications.

Net Worth Calculator

Calculate your total net worth from assets and liabilities.

Emergency Fund Calculator

Find out how large your emergency fund should be.

Credit Card Payoff Calculator

Calculate how long it could take to pay off your credit card and how much interest you may pay.

Multiple Credit Card Payoff Calculator

Compare avalanche and snowball payoff plans across multiple card balances and APRs.

Inflation Calculator

See how inflation affects the value of money over time.

Budget Calculator

Create a monthly budget and track where your money goes.

Retirement Savings Calculator

Estimate how your retirement savings could grow with regular contributions and compound returns.

Stock Profit Calculator

Calculate profit or loss on a stock trade including fees.

Dividend Calculator

Calculate dividend income and yield from your portfolio.

Dividend Reinvestment Calculator

Project DRIP growth from reinvested dividends, dividend growth, price growth, and contributions.

APR Calculator

Calculate estimated APR, monthly payment, total interest, and total borrowing cost from loan terms and fees.

Interest Calculator

Calculate simple interest, total amount, interest rate, and time period.

Rule of 72 Calculator

Estimate how long it takes to double your money using the rule of 72.

FIRE Calculator

Calculate your Financial Independence Retire Early number.

Amortisation Calculator

Generate a full loan amortisation schedule.

Rent vs Buy Calculator

Compare renting versus buying a home financially.

Gold Investment Calculator

Calculate profit, loss, and return percentage on a gold investment.

Gold Purity Calculator

Estimate pure gold weight, melt value, dealer payable value, fees, and net value from karat or purity inputs.

Dollar Cost Averaging Calculator

Calculate how regular investments could grow over time with dollar cost averaging.

Salary to Hourly Calculator

Convert an annual salary into hourly, daily, weekly, and monthly pay.

Car Affordability Calculator

Find out exactly how much car you can safely afford without stretching your monthly budget.

Loan Comparison Calculator

Compare two or three loans side by side to find the cheapest deal and lowest total cost.

Car Lease Calculator

Calculate your monthly car lease payment and total lease cost from vehicle price and lease terms.

Car Total Cost of Ownership Calculator

Estimate full car ownership cost including depreciation, fuel, insurance, tax, maintenance, and finance interest.

Pay Raise Calculator

Calculate your new salary, raise amount, percentage increase, and see exactly how much extra you'll take home.

Hourly to Salary Calculator

Quickly convert your hourly wage into a weekly, monthly, and annual salary, or calculate the exact hourly rate of a salary offer.

Overtime Pay Calculator

Calculate your extra earnings from time-and-a-half, double time, or any custom overtime rate.

Inflation-Adjusted Return Calculator

Discover the true growth of your investments by calculating your real return after inflation.

Loan Payment Calculator

Calculate monthly payments, total repayment, and total interest. Find out exactly how much a loan will cost you.

Investment Calculator

Project your future wealth, determine required contributions to hit your goals, and visualise compound growth over time.

Rental Yield Calculator

Evaluate property investments instantly. Calculate gross and net rental yields, or determine the rent needed to hit your targets.

Retirement Calculator

Estimate your retirement savings growth, calculate how much income you'll need, and see if you're on track to reach your financial goals.

Retirement Withdrawal Drawdown Calculator

Estimate how long a retirement pot may last under annual withdrawals, return, and inflation assumptions.

CAGR Calculator

Calculate compound annual growth rate (CAGR) and annualized returns over time.

Real Hourly Wage Calculator

Calculate your true hourly earnings after tax, commute time, commute costs, unpaid hours, and work-related expenses.

Time vs Money Calculator

Evaluate whether spending money to save time is worth it based on your hourly value and personal priorities.

Time Value of Money Calculator

Calculate future value, present value, payment needed, and simple NPV from manual rate and cash-flow assumptions.

Lifestyle Inflation Calculator

See how increasing your spending as income grows affects long-term wealth and savings potential.

Savings Delay Cost Calculator

Calculate how much delaying saving or investing may cost you in lost compound growth.

Impulse Purchase Cost Calculator

See the long-term cost of repeated impulse spending if that money were saved or invested instead.

Net Worth Target Calculator

Estimate the net worth required to support your desired lifestyle or financial independence goals.

Personal Burn Rate Calculator

Calculate how long your savings will last based on monthly spending, income, and irregular costs.

Household Cash Flow Planner Calculator

Plan monthly household cash flow from income, bills, spending, savings goals, irregular costs, and cash buffer.

Pay Rise Real Impact Calculator

Understand how a salary increase affects your take-home pay after tax, inflation, and increased spending.

Hourly Rate Calculator

Calculate your hourly rate based on income goals, business costs, billable hours, and working weeks.

Revenue Calculator

Calculate total sales revenue, required units, or selling price to hit targets.

Revenue Forecast Scenario Calculator

Forecast cautious, base, and optimistic revenue scenarios from growth, churn, seasonality, and pipeline assumptions.

Conversion Rate Calculator

Calculate conversion rate, conversions needed for target rates, and traffic needed for target outcomes.

Funnel Drop-Off Calculator

Analyse multi-step funnel conversion, stage drop-off, bottlenecks, and gap to a target final conversion rate.

Contribution Margin Calculator

Calculate contribution margin, per-unit profit, and contribution ratio.

Operating Margin Calculator

Calculate operating profit (EBIT) and operating margin from revenue and costs.

EBITDA Calculator

Calculate EBITDA, adjusted EBITDA, EBIT, and EBITDA margin from revenue and cost inputs.

Burn Rate Calculator

Calculate gross burn, net burn, and track how fast your business is spending cash.

Startup Runway Calculator

Estimate how long your business can survive based on cash and burn rate.

ROI Calculator

Calculate return on investment, profit, and annualized returns.

CAC Calculator

Calculate customer acquisition cost and evaluate marketing efficiency.

Channel CAC & Blended CAC Calculator

Compare customer acquisition cost by channel, blended CAC, paid CAC, organic CAC, spend share, and customer share.

LTV Calculator

Calculate customer lifetime value and compare LTV to acquisition cost.

Markup Calculator

Calculate selling price, cost, profit, and markup percentage.

Profit Margin Calculator

Calculate profit, margin, markup, and optimal selling price.

Gross Profit Calculator

Calculate gross profit, margin, and markup from revenue and costs.

Net Profit Calculator

Calculate net profit, total expenses, and net margin.

Commission Calculator

Calculate sales commission, total earnings, and commission rates.

Commission Plan Accelerator Calculator

Model quota attainment, tiered commission, accelerators, splits, draws, clawbacks, and total earnings.

Break-Even Calculator

Calculate break-even units, break-even revenue, and contribution margin.

Multi-Product Break-Even Calculator

Calculate weighted contribution margin and break-even units across a product mix.

Cash Flow Forecast Calculator

Project monthly business cash flow, ending cash, and possible shortfall timing from revenue and cost assumptions.

Day Rate Take-Home Calculator

Convert your freelance day rate into actual take-home income after taxes, unpaid time, and business expenses.

What Should I Charge Calculator

Determine your ideal freelance rate based on desired income, expenses, taxes, and realistic working time.

Freelancer vs Salary Calculator

Compare freelance income versus salaried employment including taxes, benefits, and unpaid time.

Billable Days Calculator

Estimate how many days you can realistically bill per year after holidays, admin work, sickness, marketing, and downtime.

Timesheet Utilisation Calculator

Calculate billable utilisation, non-billable time, target gap, revenue, and blended hourly yield from timesheet rows.

Income Volatility Buffer Calculator

Calculate how much savings you may need to handle inconsistent freelance or business income.

Retainer vs Hourly Calculator

Compare the financial value of retainer contracts versus hourly billing.

Retainer Scope & Overage Calculator

Model included hours, rollover, tiered overage, admin time, effective rate, and renewal fee scenarios.

Client Concentration Risk Calculator

Measure how dependent your income is on a small number of clients and the risk involved.

Invoice Fee Impact Calculator

Calculate how payment processor fees affect invoice income and monthly revenue.

SaaS Pricing Calculator

Design and test SaaS pricing based on costs, margins, expected users, and target revenue.

SaaS Pricing Tier Packaging Calculator

Compare SaaS pricing tiers, seat minimums, add-ons, annual discounts, tier mix, revenue, cost, and gross margin.

Usage-Based Billing Calculator

Model included usage, overage revenue, variable usage cost, add-ons, and SaaS billing margin.

LTV vs CAC Breakeven Calculator

Determine whether customer acquisition cost is sustainable compared with lifetime value.

Churn Impact Calculator

Understand how customer churn affects revenue and long-term growth.

Cohort Retention Churn Curve Calculator

Model cohort retention curves, logo churn, expansion, downgrades, NRR, and retained revenue.

Freemium Viability Calculator

Evaluate whether a freemium model can sustain your business based on conversion rates and costs.

Cost per Feature Calculator

Analyse whether a product feature may generate enough revenue to justify development cost.

RICE Prioritisation Calculator

Score product ideas and roadmap initiatives using reach, impact, confidence, and effort.

Build vs Buy Software Calculator

Compare the cost and long-term impact of building custom software versus buying an existing solution.

Software Vendor TCO Procurement Calculator

Estimate SaaS vendor total cost with implementation, migration, training, review, renewal, and exit costs.

Capital Gains Tax Calculator

Calculate UK capital gains tax, taxable gain, and after-tax proceeds.

Tax Bracket Calculator

Calculate UK income tax, marginal rate, and effective tax rate.

UK Income Tax Calculator

Estimate UK income tax due with personal allowance, regional tax bands, and effective/marginal rates.

VAT Calculator

Add or remove VAT and calculate VAT amounts.

Salary After Tax Calculator

Estimate UK take-home pay, income tax, National Insurance, and net salary.

Federal Income Tax Calculator (US)

Estimate US federal income tax, effective tax rate, and take-home pay.

Tax Bracket Calculator (US)

Estimate your US federal tax bracket, taxable income, federal tax, and effective tax rate.

Itemized vs Standard Deduction Calculator (US)

Compare itemized deductions with the standard deduction to see which may save more.

Tax Withholding Calculator (US)

Estimate whether your federal tax withholding may be too high, too low, or on track.

Social Security Tax Calculator (US)

Estimate Social Security tax on wages or self-employment income.

Medicare Tax Calculator (US)

Estimate Medicare tax and Additional Medicare Tax on wages or self-employment income.

Child Tax Credit Calculator (US)

Estimate your US Child Tax Credit based on income, filing status, and qualifying children.

Crypto Tax Calculator (US)

Estimate US crypto gains, losses, and capital gains tax.

Capital Gains Tax Calculator (US)

Estimate US capital gains tax on stocks, crypto, property, and other asset sales.

Dividend Tax Calculator (US)

Estimate tax on qualified and non-qualified dividends.

Net Investment Income Tax Calculator (US)

Estimate the 3.8% Net Investment Income Tax based on investment income and MAGI.

Standard Deduction Calculator (US)

Estimate your US standard deduction and taxable income based on filing status and income.

Rental Income Tax Calculator (US)

Estimate taxable rental income and tax owed.

Bonus Tax Calculator (US)

Estimate federal bonus withholding and take-home bonus pay.

401(k) Tax Savings Calculator (US)

Estimate how 401(k) contributions may reduce taxable income and save federal tax.

IRA Contribution Tax Calculator (US)

Estimate traditional IRA tax savings and taxable income reduction.

Self-Employment Tax Calculator

Estimate self-employment tax, federal income tax, and quarterly payments for freelancers.

Payroll Tax Calculator (US)

Estimate US payroll taxes, Social Security, Medicare, federal withholding, and net pay.

Effective Tax Rate Calculator (US)

Calculate your effective tax rate from income and total tax paid.

Estimated Tax Calculator (US)

Estimate US quarterly tax payments, annual tax owed, and take-home income.

Alternative Minimum Tax Calculator (US)

Estimate US Alternative Minimum Tax (AMT).

Sales Tax Calculator (US)

Calculate US sales tax, final price, and pre-tax price.

State Tax Calculator (US)

Estimate US state income tax and take-home income.

Property Tax Calculator (US)

Estimate annual and monthly property taxes based on property value and tax rate.

Stamp Duty Calculator

Estimate stamp duty or property transaction tax for a home purchase.

BMI Calculator

Calculate your Body Mass Index using metric or imperial units.

Calorie Calculator

Estimate daily calorie needs, BMR, and TDEE based on age, height, weight, and activity level.

Water Intake Calculator

Calculate your recommended daily water intake based on weight, activity, and climate.

Body Fat Calculator

Estimate body fat percentage using the U.S. Navy body fat formula.

Ideal Weight Calculator

Find your healthy weight range using established ideal weight formulas.

Heart Rate Zone Calculator

Estimate max heart rate and heart rate training zones with standard and Karvonen methods.

Waist-to-Height Ratio Calculator

Calculate waist-to-height ratio from waist and height measurements with cautious interpretation.

Fitness Goal Calculator

Estimate how long it will take to lose weight, gain muscle, or improve fitness based on your goals.

Workout Planner

Generate a custom weekly workout plan based on your goals, experience level, and available equipment.

1 Rep Max Calculator

Estimate your one-rep max and calculate training percentages from the weight you lifted and reps completed.

Progressive Overload Calculator

Plan gradual weekly training progression using weight, reps, sets, volume, and optional deload weeks.

Running Pace Calculator

Calculate running pace, finish time, and average speed for any running distance.

Advanced Race Pace Calculator

Plan race pace, target finish time, and even or negative split tables for common running distances.

Protein Intake Calculator

Calculate daily protein needs based on body weight, activity level, and fitness goal.

Calories Burned Calculator

Calculate how many calories you burn during exercise and physical activity.

Calorie Deficit Calculator

Calculate your daily calorie deficit needed to reach your weight loss goals.

Macro Calculator

Calculate your daily macronutrient targets based on your fitness goals.

Custom Macro Split Calculator

Convert a calorie target into protein, carbohydrate, and fat grams using custom macro percentages.

A-Level Grade Calculator

Estimate your A-Level result using marks, percentages, and assessment weightings for UK courses.

Attendance Calculator

Calculate your current attendance percentage and track how missed classes affect your academic standing.

Can I Still Pass This Course Calculator

Check whether passing your class is still mathematically possible and what average you need on remaining work.

Credits to Graduate Calculator

Calculate remaining credits, degree progress, and estimated terms left until graduation.

Exam Countdown Calculator

Find the days, weeks, hours, and minutes remaining until your exam.

Final Grade Calculator

Calculate what you need on your final exam or estimate your final course grade.

GCSE Grade Calculator

Estimate your UK GCSE grade from marks and weighted assessment components.

GPA Calculator

Calculate your US GPA from letter grades and course credits.

Weighted High School GPA Calculator

Calculate weighted and unweighted GPA from high school courses, credits, grades, and AP or honors levels.

GPA to Percentage Converter

Convert a GPA into an estimated US percentage range and letter grade.

Grade Calculator

Calculate your current class grade from assignments, tests, quizzes, points, and weights.

Percentage to GPA Converter

Convert a percentage grade into an estimated 4.0 or 5.0 GPA and letter grade.

Required Attendance Calculator

Find how many consecutive classes you need to attend to reach a target attendance percentage.

Study Time Calculator

Break down total study hours into daily or weekly study targets.

Revision Planner Calculator

Plan revision time, study sessions, and exam preparation schedules.

Spaced Repetition Topic Mastery Calculator

Prioritise revision topics by confidence, practice score, exam urgency, review intervals, and daily study capacity.

UCAS Points Calculator

Calculate UCAS tariff points from UK qualification grades and compare them with an offer target.

UK Grades to GPA Converter

Convert GCSE, A-Level, degree, or percentage grades into an estimated US GPA equivalent.

What Grade Do I Need to Pass Calculator

Find the minimum score needed on a final exam or remaining coursework to reach your passing goal.

Concrete Calculator

Estimate concrete volume for slabs, footings, and columns in cubic yards, cubic metres, and cubic feet.

Concrete Bag Calculator

Estimate concrete bags needed and compare bagged mix with manual ready-mix pricing and delivery fees.

Flooring Calculator

Estimate laminate, hardwood, vinyl, or carpet needed for rooms and floor projects.

Carpet Roll Calculator

Estimate carpet roll length, strips, seams, pattern allowance, waste, underlay, and rough material cost.

Stair Carpet Calculator

Estimate stair carpet or runner length, covered area, waste, underlay, and rough material cost.

Gravel Calculator

Estimate gravel volume and weight for driveways, paths, and landscaping projects.

Paint Calculator

Estimate how much paint you need for rooms, walls, doors, windows, and multiple coats.

Paint Cost & Primer Calculator

Estimate wall paint, primer, ceiling paint, trim paint, supply costs, and rounded tin counts.

Paver Calculator

Estimate pavers or bricks needed for patios, paths, and driveways.

Paver Base Calculator

Estimate paver base aggregate, bedding sand, edging length, delivery, and material cost.

Roofing Calculator

Estimate roof area, roofing material, and shingle bundles.

Square Footage Calculator

Calculate room, floor, and wall area in square feet and square metres.

Multi-Room Area Calculator

Add multiple rooms, alcoves, closets, exclusions, and waste allowance to estimate total project area.

Land Area Calculator

Calculate and convert land area for plots, gardens, and site layouts.

Fence Calculator

Estimate fence panels, posts, and optional material cost from fence length, gates, and spacing assumptions.

Fence Concrete & Hardware Calculator

Estimate fence post concrete, gravel boards, rails, fixings, gate hardware, and rough material cost.

Material Take-Off Calculator

Estimate construction material quantities, waste allowance, unit cost, and line-item totals for early take-offs.

Tile Calculator

Estimate tiles needed for floors, walls, and rooms, including waste allowance.

Tile Adhesive & Grout Calculator

Estimate tile adhesive, grout, spacer packs, sealer allowance, and material cost.

Rent vs Buy Break-Even Calculator

Determine how long it may take for buying a property to become more financially beneficial than renting.

Overpay Mortgage vs Invest Calculator

Compare the possible outcome of overpaying your mortgage versus investing the same monthly amount.

Am I House Poor Calculator

Assess whether housing costs are consuming too much of your income and limiting your wider lifestyle.

Renovation vs Moving Calculator

Compare the financial and practical impact of renovating your current home versus moving to a new one.

True Buy-to-Let ROI Calculator

Calculate real return on investment for rental properties after costs, finance, tax, and vacancy periods.

Equity Growth Timeline Calculator

Track how your ownership stake in a property may grow through repayments and price appreciation.

Airbnb vs Long-Term Rental Calculator

Compare profitability between short-term rentals and traditional long-term leasing.

Short-Term Rental Seasonality Calculator

Estimate seasonal short-term rental revenue, occupancy, fees, costs, and net income.

Renovation Budget & Contingency Calculator

Estimate itemised renovation costs, contingency, committed quotes, phase budgets, and funding gap.

Moving Cost Calculator

Estimate moving costs by home size, distance, moving method, extras, and likely cost range.

Moving Inventory Calculator

Build a room and item inventory estimate for moving time, packing materials, mileage, labour, and buffer costs.

Percentage Calculator

Calculate percent of a number, percent change, discounts, markups, and percent difference with formula breakdowns.

Electricity Cost Calculator

Estimate daily, weekly, monthly, and yearly appliance electricity cost from watts and kWh rate.

Appliance Energy Audit Calculator

Rank household appliances by estimated monthly kWh use and electricity cost.

Fuel Cost Calculator

Estimate one-way or round-trip fuel cost from distance, MPG, fuel price, and trip presets.

EV Charging Cost Calculator

Estimate electric car charging cost from distance, efficiency, electricity rate, and charging loss.

Business Days Calculator

Count working days between dates or add business days while excluding weekends and optional dates.

Journey Time & Cost Calculator

Estimate manual journey time and route cost from distance, speed, stops, fuel, tolls, parking, and travellers.

Age Calculator

Calculate your exact age in years, months, days, weeks, and total days lived.

Discount Calculator

Calculate the final price after applying a discount and see exactly how much you are saving.

Stacked Discount Calculator

Compare multiple percentage and fixed discounts to estimate the best checkout total.

Length Converter

Convert metric and imperial length units with quick presets and a full multi-unit breakdown.

Weight Converter

Convert kilograms, pounds, ounces, grams, stones, tonnes, and US tons with instant breakdowns.

Temperature Converter

Convert Celsius, Fahrenheit, and Kelvin with common reference points and formula-aware results.

Speed Converter

Convert km/h, mph, m/s, ft/s, and knots with presets and a multi-unit speed breakdown.

Data Storage Converter

Convert decimal and binary data storage units with byte values and side-by-side breakdowns.

Currency Converter

Convert common currencies with quick presets, inverse rates, and a multi-currency breakdown.

Add/Subtract Time Calculator

Easily add or subtract hours, minutes, and seconds from any time or date.

Time Duration Calculator

Calculate elapsed time between two times or date-times with overnight and seconds support.

Tip Calculator

Calculate tips, total bill, per-person split, and optional rounding for group meals.

Split Expenses Unevenly Calculator

Split shared expenses between multiple people using custom percentages and see who owes what.

Group Expense Settlement Calculator

Work out who owes whom after multiple people pay for shared group expenses.

Reverse Percentage Calculator

Find the original value before a percentage increase or decrease was applied.

VAT Add / Remove Calculator

Quickly add VAT to a net price or remove VAT from a VAT-inclusive price.

Deadline Buffer Calculator

Add a safety buffer to a deadline to account for delays, risk, and uncertainty.

Time Zone Overlap Calculator

Find overlapping working hours between two time zones for meetings and collaboration.

Word Unscrambler

Unscramble letters and find valid words to boost your scores in word games and puzzles.

Anagram Generator

Generate exact single-word and phrase anagrams from any word or letters.

Scrabble Word Finder

Find the highest scoring words from your letters to dominate your next game of Scrabble.

Word Finder

Search the dictionary by exact pattern, length, or included letters. Perfect for crosswords and word puzzles.

Unscramble with Blanks

Find words from letters with blank tiles or wildcard letters.

Aspect Ratio Calculator

Calculate width, height, and simplified aspect ratios for images, videos, screens, and responsive designs.

Responsive Image Srcset Calculator

Generate responsive image candidate widths, srcset strings, sizes attributes, and img markup.

Base64 Encoder/Decoder

Encode text to Base64 or decode Base64 to readable text instantly.

CSS Clamp Calculator

Generate responsive CSS clamp() values for fluid typography, spacing, and layouts.

Color Picker & Converter

Pick colours and convert between HEX, RGB, RGBA, HSL, and HSV formats.

Color Palette Generator Calculator

Generate colour harmonies, tints, shades, and CSS token suggestions from one HEX colour.

WCAG Contrast Checker Calculator

Check foreground and background colour contrast ratios against WCAG AA and AAA thresholds.

Flexbox Calculator

Calculate flexbox item widths, gaps, container widths, and generate CSS flex layouts.

Grid Layout Calculator

Calculate CSS grid columns, gaps, container widths, and generate grid-template-columns CSS.

HTML Encoder/Decoder

Encode text to HTML entities or decode HTML entities to readable text instantly.

Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text.

File Hash Checksum Calculator

Calculate SHA file hashes and checksums locally in your browser.

IP Address Lookup

Check IPv4, IPv6, public, private, and network details for an IP address.

JSON Formatter & Validator

Format, validate, beautify, and minify JSON data online.

JSON Schema Validator Calculator

Validate JSON against common schema rules including type, required fields, properties, arrays, enums, and ranges.

REM to PX Converter

Convert rem to pixels and pixels to rem using any CSS root font size.

Random String Generator

Generate random strings, token-like values, IDs, placeholders, and test data.

Regex Tester

Test regular expressions online, highlight matches, and inspect capture groups.

Text Case Converter

Convert text to uppercase, lowercase, title case, camelCase, snake_case, and more.

QR Code Customizer Calculator

Build single or bulk QR payloads with URL, text, email, phone, SMS, vCard, color, and quiet-zone planning options.

URL Encoder/Decoder

Encode text for URLs or decode URL-encoded text instantly.

URL Parser

Parse URLs into protocol, host, path, query strings, parameters, and fragments.

UUID Generator

Generate random UUIDs and GUIDs instantly for databases, APIs, and testing.

Unix Timestamp Converter

Convert Unix timestamps to dates and dates to Unix timestamps instantly.

User Agent Parser

Parse browser user agent strings to identify browser, OS, device, and engine details.

Viewport Unit Calculator

Convert vw, vh, vmin, and vmax units into pixels from screen dimensions.

Word Counter

Count words, characters, sentences, paragraphs, and reading time instantly.

API Cost Calculator

Estimate the cost of using APIs based on request volume, pricing tiers, and usage patterns.

API Pricing Tier Calculator

Estimate API cost from free allowances, tiered usage bands, minimum spend, platform fees, discounts, and buffers.

Server Cost vs User Growth Calculator

Estimate how server or infrastructure costs scale as your user base grows.

Cloud Cost Estimator Calculator

Estimate cloud infrastructure costs based on compute usage, storage, bandwidth, and managed services.

Infrastructure Capacity Planning Calculator

Estimate required service instances, peak load, headroom, utilisation, and rough monthly capacity cost.

Observability Logs Cost Calculator

Estimate logs, metrics, traces, retention, alerting, and observability seat costs from manual rates.

Database Cost Calculator

Estimate database instance, replica, storage, backup, IOPS, pooling, monitoring, and support costs.

File Size Calculator

Estimate file sizes, storage needs, and data transfer requirements.

Video Bitrate File Size Calculator

Estimate video file size from bitrate and duration, or required bitrate for a target file size.

Download Time Calculator

Estimate how long a file download or upload may take based on size and connection speed.

Internet Speed Calculator

Estimate bandwidth, transfer speed, and connection needs for browsing, work, and streaming.

Ping Latency Jitter Calculator

Score real-time connection quality from entered ping, jitter, packet loss, and ping spread values.

Binary Calculator

Convert values between binary, decimal, and hexadecimal with optional bit-width context.

Subnet Calculator

Calculate IPv4 CIDR subnet details including network address, usable range, broadcast address, mask, and host count.

RAID Usable Capacity Calculator

Estimate usable storage for RAID 0, 1, 5, 6, 10, and JBOD after spares and filesystem overhead.

Algebra Solver

Solve simple one-variable linear equations in x and see the rearranged coefficient and constant.

Systems of Equations Calculator

Solve two-variable linear systems, find x and y, and identify parallel or dependent equations.

Average Calculator

Calculate mean, median, mode, range, quartiles, variance, and standard deviation.

Weighted Average Calculator

Calculate a weighted mean from values and weights, with contribution breakdowns and grade-style percentage support.

Density Calculator

Calculate density, mass, or volume with standard formulas and unit conversion.

Dilution Calculator

Calculate dilution variables using C1V1 = C2V2.

Serial Dilution Calculator

Plan serial dilution concentrations, cumulative factors, transfer volume, and diluent volume across multiple steps.

Distance Between Two Points Calculator

Calculate coordinate distance, delta x, delta y, and related line information.

3D Distance & Vector Calculator

Calculate 3D point distance, vector magnitude, dot product, and angle between vectors.

Force Calculator

Calculate force, mass, or acceleration with a tabbed Newton's second law tool.

Weight Gravity Force Calculator

Calculate weight force from mass and gravity, with Earth, Moon, Mars, Jupiter, and custom gravity comparisons.

Fraction Calculator

Add, subtract, multiply, and divide stacked fractions with simplified, mixed, and decimal results.

Gas Law Calculator

Solve pressure, volume, moles, or temperature using the ideal gas law.

Van der Waals Calculator

Estimate real-gas pressure with the Van der Waals equation using entered a and b constants.

Kinetic Energy Calculator

Calculate kinetic energy, mass, or velocity with a focused physics tool.

Momentum Calculator

Calculate momentum, final momentum, impulse, and average force from mass and velocity change.

Log Calculator

Calculate base logs, natural logs, and antilogs with clear formulas.

Molar Mass Calculator

Calculate molar mass from a chemical formula with element breakdowns.

Molarity Calculator

Calculate molarity, moles, or volume with chemistry formula tabs.

Mole Calculator

Convert between mass, moles, molar mass, and particles with Avogadro's number.

Normality Calculator

Calculate normality, solute mass, equivalent weight, or volume for chemical solutions.

Percentage Increase / Decrease Calculator

Calculate percent change, percent difference, and reverse percentage changes.

Probability Calculator

Calculate simple probability, event odds, and probability comparisons.

Sample Size Calculator

Estimate survey sample size from confidence level, margin of error, expected proportion, population size, and response rate.

Statistical Significance Calculator

Check whether two conversion rates are statistically different using a simplified two-proportion z-test.

Area Calculator

Calculate area for common shapes, rooms, surfaces, and measurement problems.

Volume Calculator

Calculate volume for common shapes, containers, materials, and measurement problems.

Perimeter Calculator

Calculate perimeter or circumference for common geometric shapes with clear formula breakdowns.

Surface Area Calculator

Calculate total and lateral surface area for common 3D shapes with formula breakdowns.

Unit Conversion Calculator

Convert measurement units across length, area, volume, mass, temperature, and speed with formula-aware output.

pH Calculator

Convert between pH, pOH, hydrogen ion concentration, and hydroxide ion concentration.

Buffer pH Henderson-Hasselbalch Calculator

Estimate buffer pH from pKa, conjugate base, and weak acid using the Henderson-Hasselbalch equation.

Pressure Calculator

Calculate pressure, force, or area with physics formulas and unit conversion.

Fluid Hydrostatic Pressure Calculator

Calculate fluid pressure from density, gravity, depth, and optional surface pressure.

Quadratic Equation Calculator

Solve quadratic equations and find real or complex roots.

Ratio Calculator

Simplify ratios, solve equivalent ratios, split totals, and compare proportional values.

Three-Part Ratio Calculator

Split totals across three proportional parts or scale a three-part recipe from one known amount.

Reaction Yield Calculator

Calculate percent yield, actual yield, or theoretical yield with chemistry-focused guidance.

Scientific Calculator

Use a full scientific calculator with advanced math functions, memory, history, and keyboard support.

Scientific Notation Converter

Convert between standard form, scientific notation, and E notation.

Slope Calculator

Find slope, rise, run, and the line equation between two points.

Solution Preparation Calculator

Calculate solute mass, molarity, final volume, or molar mass for solution preparation.

Speed / Distance / Time Calculator

Calculate speed, distance, or travel time using the rate formula with clear assumptions.

Acceleration Kinematics Calculator

Calculate final velocity, displacement, and average velocity for constant-acceleration motion.

Standard Deviation Calculator

Calculate standard deviation, variance, mean, and related statistics.

Z-Score Normal Distribution Calculator

Calculate z-score, left-tail probability, right-tail probability, and two-tail normal probability estimates.

Business Name Generator

Generate business name ideas by industry, style, keywords, and brand tone.

Coin Flip Generator

Flip a virtual coin once or many times with fair random heads or tails results.

Decision Helper Generator

Compare options with weighted criteria and generate a practical decision suggestion.

Domain Name Generator

Generate domain name ideas from keywords, brand style, extensions, and length preferences.

Email Signature Generator

Create a professional email signature with contact details, role, company, and social links.

Fantasy Name Generator

Generate fantasy character, place, guild, kingdom, or creature names by style.

Invoice Number Generator

Generate sequential invoice numbers with prefixes, dates, padding, and batch export.

Lottery Combination Generator

Generate random lottery number combinations with main numbers and optional bonus balls.

Passphrase Generator

Generate strong memorable passphrases using word count, separators, numbers, and casing options.

Raffle Picker Generator

Pick random raffle winners from a list of entries with optional duplicate handling.

Random Date Generator

Generate random dates within a custom range, with weekday filters and batch output.

Random Dice Roller

Roll virtual dice with custom sides, quantity, modifiers, history, and total results.

Random Number Generator

Generate random numbers within a custom range, with quantity, decimals, uniqueness, and sorting.

Random Picker Generator

Pick one or more random items from a custom list, with optional weights and no-repeat mode.

Random Team Generator

Split names into random teams by team count or team size, with balanced groups.

Random Word Generator

Generate random words by theme, length, part of speech, and quantity.

Spinner Wheel Generator

Create a custom spinning wheel to randomly choose names, tasks, prizes, or decisions.

Username Generator

Generate username ideas from keywords, tone, length, numbers, and separator options.

WiFi QR Code Generator

Generate a WiFi QR payload and printable QR-style card from network details.

Yes or No Generator

Generate a quick yes, no, or maybe answer for lightweight decisions.

YouTube Channel Name Generator

Generate YouTube channel name ideas by niche, audience, tone, and content style.

Pomodoro Timer Calculator

Plan focus rounds, short and long breaks, and total session time with a Pomodoro-style schedule.

Cost of Procrastination Calculator

Estimate the financial and time cost of delaying tasks, decisions, or goals over time.

What Your Habits Cost Per Year Calculator

Calculate the long-term financial impact of recurring habits like coffee, subscriptions, or small daily purchases.

How Long to Reach Your Goals Calculator

Estimate how long it will take to achieve a personal goal based on current progress and weekly effort.

Alcohol Units Calculator

Calculate drink units and pure alcohol content from volume and ABV.

Birthday Calculator

Discover the day of the week you were born, calculate your exact age down to the day, and count down to your next birthday.

Carbon Footprint Calculator

Estimate annual CO2 emissions from driving, flights, diet, and home energy use.

Coffee Intake Calculator

Estimate daily caffeine intake from coffee, tea, energy drinks, and soft drinks.

Commute Cost Calculator

Estimate daily, weekly, monthly, and yearly commuting costs.

Commute Cost Comparison Calculator

Compare car, public transport, and bike or walk commute options by money and time cost.

Daily Habit Tracker Calculator

Score daily habit completion and estimate routine consistency.

Daily Routine Planner

Build a structured daily routine with wake time, bedtime, and time blocks.

Task Schedule Planner Calculator

Plan a task schedule from available time, priorities, task durations, breaks, and fixed pauses.

Digital Detox Calculator

Measure screen overload and plan realistic reductions to reclaim time.

Due Date Calculator

Calculate an estimated pregnancy due date, weeks pregnant, and trimester.

Grocery Budget Calculator

Estimate weekly, monthly, and yearly food spending by household size.

Life Expectancy Calculator

Estimate lifespan from age, sex, smoking status, and exercise frequency.

Love Compatibility Calculator

Calculate a fun compatibility score from two names.

Meal Cost Calculator

Calculate recipe cost, cost per serving, and batch cost from ingredients.

Full Recipe Costing Calculator

Calculate ingredient cost, batch cost, cost per serving, and menu pricing from recipe quantities.

Name Numerology Calculator

Find a name number using the Pythagorean numerology letter system.

Personality Score Calculator

Take a quick personality quiz and get a fun trait summary.

Pet Age Calculator

Convert dog or cat age into estimated human years and life stage.

Productivity Score Calculator

Measure focus, task completion, and execution with a simple productivity score.

Screen Time Calculator

Estimate daily, weekly, monthly, and yearly screen time totals.

Sleep Calculator

Find bedtime or wake-up times using 90-minute sleep cycles.

Time Between Dates Calculator

Calculate days, weeks, months, years, hours, and minutes between two dates, with inclusive counting.

Travel Budget Calculator

Estimate total trip cost, per-person cost, and daily vacation budget.

Work Hours Calculator

Calculate shift duration, unpaid breaks, paid hours, weekly hours, and estimated gross pay.