Business
Customer Lifetime Value Calculator
Estimate customer lifetime value from order value, purchase frequency, margin, and retention.
Embeddable calculators
Embed a calculator on your website
Build a lightweight iframe widget, preview it at real column widths, then copy the final HTML.
Why your website needs one of these iframe calculators
Embeddable calculator widgets give visitors a useful reason to stay on your page, whether you run a finance blog, mortgage broker website, property investment guide, SaaS resource hub, ecommerce advice page, accountancy site, or small business publication. A focused iframe calculator can support buyer research, improve engagement, answer common questions directly inside your content, and help turn informational pages into practical tools without building custom calculator software from scratch.
Widget builder and responsive preview
Choose the widget settings first, then use the width controls to see how the iframe behaves in a full content area, article column, sidebar, or mobile-sized slot.
Generate embed code
CSS size changes the widget stylesheet. Width and height controls only affect this preview frame, so you can spot cramped columns or clipped bottoms before copying the code.
Customer Lifetime Value Calculator720px preview
Business
ROI Calculator
Calculate return on investment, profit, and annualized returns.
Finance
Rental Yield Calculator
Evaluate property investments instantly. Calculate gross and net rental yields, or determine the rent needed to hit your targets.
Finance
Mortgage Calculator
Estimate principal-and-interest mortgage payments, deposit-based loan amount, and affordability.
Finance
Loan Calculator
Calculate monthly payments, total interest, and loan cost.
Tax Calculators
VAT Calculator
Add or remove VAT and calculate VAT amounts.
Tax Calculators
Salary After Tax Calculator
Estimate UK take-home pay, income tax, National Insurance, and net salary.
Health
BMI Calculator
Calculate your Body Mass Index using metric or imperial units.
Health
Calorie Calculator
Estimate daily calorie needs, BMR, and TDEE based on age, height, weight, and activity level.
Everyday Tools
Percentage Calculator
Calculate percent of a number, percent change, discounts, markups, and percent difference with formula breakdowns.
Everyday Tools
Tip Calculator
Calculate tips, total bill, per-person split, and optional rounding for group meals.
Finance
Compound Interest Calculator
Calculate how your investments grow over time with compound interest.
Finance
Budget Calculator
Create a monthly budget and track where your money goes.
Everyday Tools
Fuel Cost Calculator
Estimate one-way or round-trip fuel cost from distance, MPG, fuel price, and trip presets.
Finance
Car Affordability Calculator
Find out exactly how much car you can safely afford without stretching your monthly budget.
Finance
Car Lease Calculator
Calculate your monthly car lease payment and total lease cost from vehicle price and lease terms.
Health
Body Fat Calculator
Estimate body fat percentage using the U.S. Navy body fat formula.
Fitness
Protein Intake Calculator
Calculate daily protein needs based on body weight, activity level, and fitness goal.
Fitness
Running Pace Calculator
Calculate running pace, finish time, and average speed for any running distance.