Position Size Calculator

Enter account balance, risk percent, entry and stop-loss to get recommended position size and capital used.

Executive Summary: Calculate exact shares or contracts to trade based on account size, risk percentage and stop-loss distance.

Calculator Inputs

Equity Long Mode

Symbol

NSE Cash

Direction

Account size

₹

Risk %

Entry price

₹

Stop-loss price

₹

Capital Allocation & Risk Visualizer

Real-Time Engine

Position Capital Outlay: ₹28,000.00 (28.0%) Cash Reserve: ₹72,000.00 (72.0%)

Trade Loss at Stop Loss: ₹1,000.00 (1.00%) Protected Capital: ₹99,000.00 (99.00%)

Stop Loss: ₹1,350.00 20 Shares Entry Price: ₹1,400.00

Unit Risk: ₹50.00 (3.57%) Position Sizing Rule: Integer Shares Sized to Account Cap

Entry: 1400.00 Stop Loss: 1350.00

Risk: 50.00 (3.57%)

Allocation: 28.0%

Primary Results

Position Size (Shares)

20 Shares

Floor integer calculation

Total Risk

₹1,000.00

Max loss on stop trigger

Capital Required

₹28,000.00

28.0% of portfolio

Account Risk Ratio

1.00%

1.0% Risk rule compliant

Position Scaling & Risk Sensitivity Matrix

Explore multiple risk tolerance scenarios based on your ₹1,400.00 entry and ₹1,350.00 stop loss

Unit Risk: ₹50.00 / Share

Risk Profile	Risk %	Max Risk (₹)	Position Size	Capital Outlay (₹)	Portfolio Allocation	Status

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How to Calculate Position Size

Position sizing is the foundation of risk management in trading. It determines exactly how many shares or contracts you should buy or sell to ensure that if your stop loss is hit, you only lose a predetermined percentage of your account.

The Mathematical Formula

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

Risk Per Unit = | Entry Price - Stop Loss Price |

Position Size = Risk Amount ÷ Risk Per Unit

Worked Calculation Example

If you have a ₹1,00,000 account and want to risk 1% per trade, your maximum risk amount is ₹1,000.

If you buy a stock at ₹1,400 with a stop loss at ₹1,350, your risk per share is ₹50.

Therefore, your position size should be: ₹1,000 ÷ ₹50 = 20 shares.

Note: This calculator rounds down to the nearest whole share to ensure you never exceed your maximum risk.

How It Works

This position size calculator takes your account balance and risk percentage to figure out how many shares or contracts to buy. It prevents emotional overleveraging and ensures you maintain an institutional-grade risk profile across every trade.

Position Sizing Formula & Calculation Logic

Position Size = (Account Balance × Risk %) ÷ |Entry Price - Stop Loss Price|

Frequently Asked Questions — Risk Management & Sizing

Key principles for protecting capital and managing position sizing risk

Why is position sizing important?

▼

It helps manage risk and prevents blowing up your account. By strictly predetermining your loss before ever clicking the buy button, no single adverse market event or series of consecutive drawdowns can permanently wipe out your trading capital.

Does this work for crypto and forex?

▼

Yes, just input the asset price and stop loss. In cryptocurrencies and forex, you can trade fractional units (e.g., 0.15 BTC or 0.05 lot) because contracts are infinitely divisible, whereas equities in Indian markets (NSE/BSE) round down to the nearest integer share.

What is the 1% risk rule?

▼

The 1% rule stipulates that a trader should never risk more than 1% of their total trading capital on any single setup. This ensures that even after a catastrophic streak of 10 consecutive losses, you will still retain over 90% of your initial capital.

How does leverage affect position size?

▼

Leverage does not alter your safe position size; it only reduces the cash required as margin collateral. Your risk amount ($/₹) must remain constant regardless of whether you are using 1x cash or 5x intraday margin.

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