Stock return calculator
Estimate profit/loss and return on a buy-then-sell trade.
The stock return calculator takes your buy price, sell price, share count, and a fee percentage applied on both sides of the trade, then computes your total cost, proceeds, profit or loss, return percentage, and (given a holding period) an annualized return figure.
How to use
- Enter your buy price, sell price, number of shares, and the fee/commission percent charged on each side of the trade.
- Optionally enter the holding period in days to also see an annualized return figure.
- Return % = profit ÷ total cost; annualized return projects that return as if it were held for exactly one year, assuming the same rate compounds.
Common use scenarios
- Checking the actual return on a completed trade after fees.
- Comparing the profitability of two different trades.
- Understanding how much fees ate into a trade's return.
- Seeing what a short-term gain would look like annualized.
✓Content & verification reviewed: 2026-08-25
How we verify Stock return calculator
How to confirm the numbers reflect your actual trade.
Fees are applied on both the buy and sell side
The fee percentage increases your effective cost when buying and reduces your effective proceeds when selling — entering the correct round-trip fee percentage matters, since a mismatched fee assumption noticeably changes the calculated profit on smaller trades.
Return percent is relative to your total cost, not just the price change
Return % = profit ÷ total cost (including fees), not simply (sell price − buy price) ÷ buy price — this is why the return percentage is usually a little lower than a naive price-change calculation would suggest.
Annualized return is a projection, not a guarantee
It mathematically extrapolates your actual return as if the same rate applied for a full year — a strong short-term trade can produce a very large annualized number that doesn't reflect a realistic expectation of repeating that result all year.
Before you rely on the result
- The fee percentage you entered reflects your actual round-trip trading cost, not just one side.
- You're reading return percent as relative to total cost (including fees), not a simple price-change calculation.
- If you entered a holding period, you understand the annualized figure is a projection, not an expectation.
- You've double-checked share count and prices match your actual trade confirmation.
Who this is for
- Anyone checking the actual return on a completed trade after fees.
- People comparing the profitability of two different trades.
- Anyone wanting to see how much fees ate into a trade's return.
- People curious what a short-term gain looks like annualized.
Real-world examples
Post-trade return check
Someone who just closed a position enters the buy price, sell price, shares, and fee percentage to see the actual profit after costs, not just the raw price difference.
Comparing two trades
An investor comparing two completed trades with different holding periods calculates the annualized return for each to see which was actually more efficient use of capital.
Understanding fee drag
Someone curious how much a high fee percentage affects a small, quick trade compares the calculated profit with fees at different percentages to see the impact.
Limitations
- Uses a flat percentage fee on both the buy and sell side — it doesn't model tiered commissions, minimum fees, taxes, or currency conversion costs.
- Annualized return is a mathematical projection, not a real-world guarantee — it assumes the same return rate would repeat, which short trades in particular rarely reflect accurately.
Frequently asked questions
Why is my return percent lower than the simple price change?
Because it's calculated against your total cost including fees, not just the raw buy-to-sell price difference — fees on both sides reduce the effective return.
What does the annualized return actually mean?
It's a mathematical projection of what your return would be if the same rate continued for a full year — useful for comparing trades of different lengths, but not a realistic expectation that the same gain would repeat all year.
Does this account for taxes on capital gains?
No — it only models the trade price and a flat trading fee percentage; any capital gains tax owed is separate and not included in this calculation.
What if I don't know the exact holding period?
Leave that field blank — the tool will still calculate profit, proceeds, and return percent, just without the annualized figure.
🔒 Runs in your browser — nothing is uploaded. Results are for reference only; see the disclaimer. Last updated: 2026-08-25
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