📈 Trading & Investing

Position Size Calculator

Estimate position size from risk and stop-loss distance.

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Estimate position size from risk and stop-loss distance. This dedicated page is built for fast, clean calculations and search visibility.

Enter your values, click calculate, and see the result instantly. The page uses a simple, focused layout to improve usability on mobile and desktop.

How to use this calculator

  1. Open the position size calculator page.
  2. Enter the required values in the form fields.
  3. Click Calculate to see the result and breakdown.
  4. Use the related links to explore similar tools.
Results are estimates. For lending, taxes, trading, nutrition, or medical decisions, verify with a qualified professional.

Position Size Calculator

Estimate position size from risk and stop-loss distance.

Result
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    The math behind position sizing

    Position sizing is the most important and most neglected aspect of trading. The formula is: Position Size = (Capital × Risk%) ÷ (Entry Price – Stop Loss Price). If you have ₹5,00,000 in capital, risk 1% per trade (₹5,000), buy at ₹200 with stop at ₹190 (₹10 risk per share), your position size is 500 shares (₹5,000 ÷ ₹10).

    This keeps your loss on any single trade fixed regardless of share price or volatility. A high-priced stock with a tight stop produces the same rupee risk as a low-priced stock with a wide stop — the position size adjusts accordingly.

    Risk percentage guidelines

    • Conservative (0.5% per trade): Suitable for new traders. Allows 200 consecutive losses before 50% drawdown.
    • Standard (1% per trade): Industry standard for systematic traders. 100 consecutive losses to reach 50% drawdown.
    • Aggressive (2% per trade): Only for experienced traders with proven strategies. 50 bad trades can halve the account.
    • Above 2%: Not recommended. Even a 70% win-rate system can suffer catastrophic drawdowns at 5% risk per trade.

    Beyond individual trade risk, cap total portfolio risk. If you have 10 open positions each risking 1%, you have 10% of capital at risk simultaneously. In a correlated selloff, you could lose 10% in a single day. Most professional traders cap total open risk at 5–6% across all positions.

    Frequently asked questions

    How does volatility affect position size?â–¼
    Higher volatility requires a wider stop to avoid random noise triggering your exit. A wider stop means fewer shares to maintain the same rupee risk. The position size automatically shrinks in volatile markets when you calculate it this way — which is correct, since volatile assets can move more against you before your thesis is proven wrong.
    Should I use the same position size for all trades?â–¼
    Fixed fractional sizing (always risking the same percentage per trade) is the standard. Some traders use variable sizing based on confidence. This is defensible if your high-conviction trades genuinely have better outcomes, but most traders overestimate their conviction, making variable sizing dangerous without data to back it.
    What if my position size calculation gives me fewer than 1 share?â–¼
    This means your risk budget is too small relative to the stop distance. You have three options: skip the trade, reduce the stop loss (only if the new level is technically valid), or accept a smaller position and acknowledge the risk management is less precise.
    How do I size positions in futures or F&O?â–¼
    For futures: Position Size (contracts) = (Capital × Risk%) ÷ (Stop distance in points × Lot size). For Nifty futures with 50 units per lot and a 100-point stop: each contract risks ₹5,000. At 1% of ₹5 lakh capital (₹5,000 risk), you trade 1 contract.