Position Size Calculator

Calculate the correct number of shares or lots to trade based on your risk tolerance.

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Calculate Your Position Size

Enter your account details and trade parameters to find the optimal position size that keeps your risk in check.

Risk Amount
—
per trade
Stop Loss Distance
—
points
Position Size
—
shares
Trade Value
—
total exposure
Lot Sizing Options
Conservative
—
—
Aggressive
—
—

This calculator helps you determine the maximum position size based on your risk parameters. Always verify with your broker's margin requirements before placing trades.

How the Calculator Works

Position sizing answers one question: how many shares or lots can I trade so that if my stop loss is hit, I only lose a predetermined percentage of my account?

The calculator uses three inputs you provide — your account size, your risk percentage, and the distance between your entry and stop loss — to compute the maximum position size that stays within your risk budget.

Risk Amount = Account Size × (Risk % ÷ 100)

Stop Loss Distance = |Entry Price − Stop Loss Price|

Position Size = Risk Amount ÷ Stop Loss Distance

Where Risk Amount is the maximum you're willing to lose on this trade, Stop Loss Distance is the per-unit risk, and Position Size is rounded down to whole shares or lots.

Example Calculation

Account Size: ₹1,00,000

Risk Per Trade: 2%

Entry Price: ₹250

Stop Loss: ₹240

Step 1 — Risk Amount = ₹1,00,000 × 2% = ₹2,000

Step 2 — Stop Loss Distance = ₹250 − ₹240 = ₹10

Step 3 — Position Size = ₹2,000 ÷ ₹10 = 200 shares

Step 4 — Trade Value = 200 × ₹250 = ₹50,000

If the stock hits your stop loss at ₹240, your planned loss is ₹2,000 — which is 2% of your account. Actual loss may vary slightly due to slippage or liquidity conditions.

How to Use This Calculator

  1. Enter your account size — the total capital in your trading account.
  2. Set your risk percentage — most traders risk 1–2% per trade. This is a personal risk management decision.
  3. Choose instrument type — Equity for stocks, Futures & Options for lot-based instruments, or Forex for currency pairs. F&O mode shows a lot size input and compares conservative vs aggressive lot options.
  4. Enter your entry price — the price at which you plan to enter the trade.
  5. Enter your stop loss — based on your chart analysis (support level, structure break, or invalidation point). This is a technical decision, not a random number.
  6. Click Calculate — the calculator shows your maximum position size, risk amount, and total trade exposure.

Why Position Sizing Matters

Position sizing is not about how much you can make — it's about how much you can afford to lose. The best traders don't have the highest win rate; they have the best risk management. Calculate your position size before every trade, honour your stop loss, and let the math protect your capital.