Stock Profit & Loss Calculator
Calculate the ideal position size and potential profit/loss for stock trades — determine recommended shares to buy based on your account risk and stop-loss levels.
Stock Profit & Loss Calculator
Account & Investment
Calculation Results
Enter your account details and trade parameters to see the recommended position size and P&L breakdown.
The Golden Rule: Never Over-leverage
How It Works
Risk management is the process of identifying, analyzing and either accepting or mitigating uncertainty in investment decisions. In trading, the most important part of risk management is **Position Sizing**.
Instead of guessing how many shares to buy, professional traders calculate their size so that if their stop loss is hit, they only lose a specific percentage of their account (usually 1% or 2%).
Formula Used
1. Risk Amount = Account Balance × Risk Percentage
2. Risk per Share = |Entry Price - Stop Loss Price|
3. Position Size = Risk Amount / Risk per Share
4. Reward Potential = Position Size × |Take Profit - Entry|
5. Risk/Reward Ratio = Potential Reward / Potential Risk
Common Trading Mistakes
❌ Revenge Trading
Doubling your position size after a loss to "make it back" is the fastest way to blow an account. Stick to the calculations.
❌ Emotional Exits
Moving your stop loss further away in hopes of a bounce usually leads to catastrophic losses. Respect your original plan.
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OpenFrequently Asked Questions
How is stock profit and loss calculated?
P&L = (Sell Price − Buy Price) × Quantity − Fees. For long positions, profit when sell > buy; for short, profit when sell < buy. The calculator handles both directions and includes commissions, taxes, and any other transaction costs you specify.
What position size should I use for a stock trade?
Position Size = (Account × Risk %) ÷ (Entry − Stop Loss Price). Example: $20,000 account, 1% risk = $200. With $50 entry and $48 stop ($2/share risk) → 100 shares. The calculator computes the recommended share count given your risk budget and stop-loss distance.
Should I include taxes when calculating stock profit?
For US/UK/EU short-term holdings (under 1 year), gains are taxed as ordinary income (22–37% in US). Long-term holdings get preferential rates (0–20%). India taxes short-term equity at 15% and long-term above ₹1L at 10%. The calculator's tax field lets you model your specific bracket — net P&L is what actually hits your account.
How do brokerage fees affect stock P&L?
Round-trip costs (open + close commission, exchange fees, SEC fees, slippage) typically run $0–$10 per trade for US discount brokers but 0.1–0.5% on most other markets. On small positions (under $1K), fees can consume 1–3% of capital — meaningful drag. Always include fees to see real net P&L.
What's the difference between gross P&L and net P&L?
Gross P&L = pure price difference × quantity (no fees, no taxes). Net P&L = gross minus all fees and taxes. Always plan trades using NET expectations — gross numbers ignore the meaningful drag of trading costs and miss the line where a winning trade becomes a losing one after expenses.
How is this different from a Trade Risk Calculator?
Trade Risk Calculator focuses on position sizing for ANY asset given risk %, R:R, and stop-loss. This Stock Profit & Loss Calculator specifically models stock trades with quantity, fees, and tax considerations. Use Trade Risk for entry decisions; use this for post-entry P&L tracking and tax planning.