Stock Profit Loss Calculator

The Stock Profit/Loss Calculator determines your gain or loss on stock investments. It accounts for buy price, sell price, number of shares, and trading commissions to show your net profit, return percentage, and annualized return.

How the Formula Works

Profit = (Sell Price − Buy Price) × Shares − Total Commissions. ROI = Profit ÷ Total Investment × 100.

How to Use This Calculator

  1. Enter the buy price per share and number of shares
  2. Enter the sell price per share
  3. Optionally enter commission fees
  4. View your net profit/loss and return percentage

Tips & Best Practices

  • Always factor in commissions and fees when calculating actual returns
  • Short-term capital gains (held < 1 year) are taxed at your regular income rate; long-term gains (held > 1 year) get favorable tax rates
  • Dollar-cost averaging reduces the impact of buying at market highs
  • Diversification across sectors and asset classes reduces portfolio risk

Important Limitations

  • Does not calculate tax obligations on gains
  • Does not account for dividends received during the holding period
  • Past stock performance does not predict future results
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