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Position Size Calculator

How much should you risk on this trade?

Plug in your account size, risk tolerance, and trade setup. We calculate exact position size, risk/reward ratio, and expected value per trade.

Risk/Reward RatioExpected ValueExact Share Count

Account Setup

$
1%
0.25%5%

Trade Setup

$
$
$

Your Strategy Stats

From your journal or backtest — used to calculate expected value.

50%
20%80%
Expected Value per Trade+$125 (+0.500%)

Positive edge — strategy is viable

Position Size

50

shares

↑ Long
Position Value$7,500
Risk Amount-$250
Potential Profit+$500
Risk/Reward Ratio1:2.00
Track This Trade in TradeZella

Got questions?

Position size is calculated by dividing your risk amount (account size × risk percentage) by the distance between your entry price and stop loss. For example, with a $25,000 account risking 1% ($250) and a $5 stop distance, your position size would be 50 shares ($250 ÷ $5).