Position Size Calculator

Calculate optimal position size

Trade Details

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How to Use This Calculator

The Position Size Calculator is an essential risk management tool for traders. Enter your total account size, the maximum percentage of your account you are willing to risk on this trade, your planned entry price, and your stop-loss price. The calculator will determine exactly how many shares you should buy to stay within your risk limits.

Formula

Risk Amount = Account Size Γ— (Risk Percentage / 100)

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

Position Size = Risk Amount / Risk Per Share

Example

If you have a $10,000 account and want to risk 1%, your risk amount is $100. If you buy a stock at $50 and place a stop loss at $48, your risk per share is $2.

To find the position size: $100 / $2 = 50 shares.

Frequently Asked Questions

Position sizing is crucial for risk management. It ensures that no single losing trade can significantly damage your overall account balance.
The 1% rule is a risk management strategy where a trader risks no more than 1% of their total account capital on any single trade.
The risk amount is calculated by multiplying your total account size by your chosen risk percentage.
Yes, using a stop loss is highly recommended as it acts as a safety net, automatically closing your position if the price moves against you by a specified amount.
The notional value of your position changes with leverage, but your risk amount (determined by your stop loss) should remain constant relative to your account size.

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