Stock Profit Calculator

This stock profit calculator helps you work out the practical result of a buy-and-sell share trade. It separates the gross price movement from trading fees, so you can see whether a trade is profitable after costs rather than just looking at the share price change.

The calculator is useful before placing an order, after closing a position, or when comparing possible exit prices. It shows net profit or loss, percentage return, total buy cost, total sell proceeds, fee drag, profit per share, and the break-even sell price.

Real investment results can be affected by taxes, spreads, currency conversion, slippage, and account rules. Treat this as a clear trade calculation, not personal investment advice.

If you buy 100 shares at GBP 12 and sell them at GBP 15, the gross price gain is GBP 300. If you paid GBP 10 to buy and GBP 10 to sell, the net profit is GBP 280.

Fees matter more on smaller trades. A trade that looks profitable from price movement alone can become much less attractive once dealing charges, spreads, and currency conversion are included.

The break-even sell price shows the point where the trade covers the purchase price and fees. It is useful before buying because it shows how far the stock must move before you are actually ahead.

For active traders, tracking break-even after fees can prevent overestimating performance from headline share price moves.

Include all direct costs, compare percentage return with the holding period, and consider tax separately. If the stock is foreign-listed, include currency movement because exchange rates can change the real result.

For long-term investing, avoid judging performance from a single trade alone. Look at total portfolio return, diversification, fees, tax position, and whether the investment still fits the plan.

The calculator separates gross share-price movement from net profit after buy and sell fees.

Break-even sell price shows the minimum price needed to cover the buy cost and both trading fees.

The return percentage is based on total buy cost, so fees reduce the percentage return as well as the cash profit.

Tax, bid-ask spread, slippage, foreign exchange movement, borrowing costs, and dividend income are not included unless you adjust the inputs separately.

Looking only at the share price gain and forgetting buy and sell fees.

Using the calculator for portfolio performance when there were multiple buys, sells, deposits, or withdrawals.

Treating pre-tax profit as the amount you will actually keep.

Use investment return when you want to measure an investment from initial value to final value over time.

Use cagr when the main question is the smoothed annual growth rate between two values.

Use investment when you are planning future contributions rather than reviewing one completed trade.

Rerun the trade when the sell price, share quantity, or dealing fees change.

For foreign-listed shares, keep currency conversion separate unless you have already adjusted the buy and sell prices.

Keep tax separate from the trade maths unless you are using a dedicated tax calculator or tax records.