Risk Management Tool

Position Size Calculator

Estimate a position size from your account risk, entry price, and stop-loss distance. A configurable portfolio cap prevents unusually tight stops from producing an oversized position.

Calculations run entirely in your browser. No values are transmitted.

Trade inputs

Enter positive values. Percentages should be entered as whole numbers, such as 1 or 14.

Entry price per share

Stop-loss price per share

Amount to risk of account

Account size total value

Maximum position cap default: 14%

Calculated position Within cap

Dollar amount to buy

$0.00

Enter trade details to calculate a position.

Shares to buy

0.00

Target risk amount

$0.00

Actual position risk

$0.00

Risk per share

$0.00

Position cap

$0.00

Account allocation

0.00%

How the calculation works

Target risk = account size × risk %. Shares are first calculated as target risk ÷ |entry − stop|. The resulting position value is then limited to account size × cap %. Fractional shares are supported and all displayed results are rounded to two decimal places.

Important: This calculator is provided for informational, analytical, research, and educational purposes only. It does not constitute personalized financial or investment advice, a recommendation to enter any trade, or a guarantee of any financial result. Position sizing cannot eliminate the risk of loss, and real executions may differ because of gaps, slippage, fees, liquidity, and other market conditions.