Stock Profit Calculator
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Projected net profit if exit price moves relative to your current sell price:
What Is a Stock Profit Calculator?
A stock profit calculator tells you exactly how much money you made — or lost — on a stock trade after fees, dividends, and taxes. Instead of guessing from the price move alone, you enter your buy price, sell price, share count, and costs, and get net profit, ROI, break-even price, and after-tax return in seconds.
Traders and long-term investors use a stock profit calculator to compare setups, check whether a trade cleared commissions, estimate capital gains tax, and decide whether an exit still meets their target return.
How to Calculate Stock Profit (Formula)
For a long position, the core stock profit formula is:
Short-sale profit
Short sellers reverse the order: you sell first and buy to cover later. Profit when the price falls equals (entry short price − cover price) × shares, minus fees. Toggle Short in this stock profit calculator to flip the math automatically.
How to Use This Stock Profit Calculator
- Enter buy and sell prices — use your actual fill prices, not just the last quote.
- Set number of shares — fractional shares are supported via decimal inputs.
- Add commissions — flat dollar fees or percentage of notional, for buy and sell.
- Include dividends if you received cash dividends while holding.
- Set your tax rate to estimate after-tax profit (use 0% to ignore tax).
- Review charts — P&L bar chart, cost breakdown donut, details table, and what-if sensitivity.
- Export — Print, download PDF, copy summary, export CSV, or share a link.
Tip: Use the What-If tab to see how ±5% to ±20% exit-price moves change your net profit before you place the sell order.
Break-Even Price Explained
Your break-even sell price is the exit price where net profit is zero after commissions (and dividends, if any). If your target sell is below break-even on a long trade, you are locking in a loss once fees are included — even if the stock is up from your entry on a raw price basis.
Why Commissions and Tax Matter
A 2% price gain can disappear after round-trip commissions on a small account. Capital gains tax further reduces what you keep. This free stock profit calculator shows both pre-tax and after-tax profit so you can size expectations realistically before you trade.
- Short-term capital gains are often taxed at ordinary income rates in many jurisdictions.
- Long-term capital gains may qualify for lower rates after a holding-period threshold (commonly one year in the U.S.).
- Dividends can be qualified or ordinary — adjust the tax rate field to model your situation.
Stock Profit Calculator Features
- Long and short position modes
- Flat or percentage commissions on each side
- Dividend income and capital gains tax
- ROI, annualized ROI, profit per share, and break-even price
- Interactive P&L bar chart, breakdown donut, and what-if sensitivity graph
- Print, PDF download, CSV export, copy summary, and shareable scenario links
- USD, EUR, GBP, and INR display symbols
- Mobile-friendly monochrome interface — no signup required
Frequently Asked Questions
Multiply the price difference by shares, then subtract commissions and add dividends. For a long trade: net profit = (sell price × shares − sell fees) − (buy price × shares + buy fees) + dividends. ROI is net profit divided by total cost basis.
It is the sell price where you neither make nor lose money after fees. This calculator solves for that price so you know the minimum exit needed to cover commissions.
Yes. Enter buy/sell commissions as dollars or percentages, optional dividends, and a capital gains tax rate. You will see pre-tax profit, tax owed on gains, and after-tax profit.
Yes — choose Short under Position Type. The calculator reverses cost and proceeds so falling prices show as profits and shrinking cover prices improve your P&L.
Yes. It is free at Misprise with no account required. Print, PDF, CSV, copy, and share tools are included.
Annualized ROI ≈ ROI × (365 ÷ holding days). A 5% gain in 90 days annualizes near 20%. This is a simple linear estimate — useful for comparing trades of different lengths, not a promise of compound returns.