# Share Profit Calculator

> Stock profit calculator: compute gain or loss, ROI, and total return on your share trades including fees. Free, private, runs in your browser, no signup.

- **Canonical URL:** https://boringtoolskit.com/stock-calc/
- **Category:** Finance & Investing
- **Evidence level:** authored-methodology
- **Reviewed:** July 26, 2026
- **Last verified:** 2026-10-12
- **Privacy:** Inputs and results stay in this browser unless the page clearly labels an external request.

## How it works

Cost basis = buy price × shares + buy fee. Proceeds = sell price × shares − sell fee. Profit/loss = proceeds − cost basis. ROI = profit/loss ÷ cost basis × 100.

## Worked example

Buying 10 shares at $50 with a $5 buy fee gives a $505 cost basis. Selling at $65 with a $5 sell fee gives $645 proceeds, $140 profit, and about 27.72% ROI before taxes.

## Assumptions

- Prices, share count, and fees are user-entered estimates; this is not a live quote or brokerage confirmation.
- Taxes, dividends, corporate actions, currency conversion, and wash-sale rules are not included.
- A negative result is a loss; ROI is shown relative to total cost basis including the buy fee.

## Common questions

### Does this include dividends?

No. Add dividends separately when comparing total return; this page estimates price profit after explicit buy and sell fees.

### Can ROI be negative?

Yes. If proceeds are below cost basis, the profit/loss and ROI are shown as negative values.

### Is this tax or investment advice?

No. It is arithmetic for a planned or completed trade. Verify lots, fees, dividends, and tax rules before making decisions.

## Related tools

- /stock-average-cost-calculator/
- /dividend-reinvestment-calculator/
- /dca-investment-calculator/

## Sources

- [Calculation methodology](/methodology/)
- [Quality evidence and verification standard](/quality-evidence/)

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*Local planning estimate. Verify current terms, rates, and policies before acting.*