About the Stock Profit Calculator
Whether you are reviewing a closed trade or planning an exit, it helps to see the numbers after trading costs. Even small commissions and fees change your break-even price and your true return, especially on smaller positions.
The calculator supports fractional shares and negative results, so you can model losses as easily as gains.
How It Works
Your total investment is the purchase cost of the shares plus the buy commission. The gross sale value is the sell price multiplied by the number of shares. Net profit is the gross sale value minus the sell commission minus your total investment.
The break-even sell price is the price per share at which you would recover the purchase cost and both commissions, for a net result of exactly $0.
Formula
Example
You buy 20 shares at $100 and sell them at $125, paying a $4.95 commission on each trade.
Inputs
- Buy price
- $100.00
- Sell price
- $125.00
- Shares
- 20
- Commissions
- $4.95 + $4.95
Results
- Investment (shares only)
- $2,000.00
- Gross profit
- +$500.00
- Net profit after fees
- +$490.10
- Break-even sell price
- $100.50
With zero commissions, the same trade shows a net profit of $500.00 and a 25.00% return.
Understanding Your Results
- Net Profit / Loss: Your result after all commissions. A minus sign indicates a loss.
- Return: Net profit as a percentage of your total investment (including the buy commission).
- Gross Profit / Loss: The price change multiplied by shares, before commissions.
- Break-even Sell Price: The sell price needed to cover your purchase and all commissions.