Position size calculator

Risk-based position sizing for forex, stocks, and crypto. Set your account size, risk percentage, and stop loss to get the right position size.

Account balance (USD)

Account currency

Risk per trade (%)

Stop loss (pips)

Pip value per standard lot (USD)

Risk amount

100.00 USD

Position size (lots)

0.50

Position size (units of base)

50,000

How to use this calculator

Position sizing answers the question: how many units should I trade so that if my stop loss is hit, I lose no more than X% of my account? Keeping risk consistent per trade is one of the most important habits of professional traders.

Lots = (Account × Risk%) ÷ (Stop pips × Pip value per lot)

Inputs explained

Account balance: your total trading capital in your account currency.
Risk per trade (%): the percentage of your account you are willing to lose on this trade. Most risk managers recommend 1–2%.
Stop loss (pips): the distance in pips from your entry to your stop loss order.
Pip value per standard lot: how much one pip is worth in your account currency for 1 lot. Use the Pip Calculator on this site to find the exact value for your pair.

Worked example

Account: $10,000, risk: 1%, stop loss: 20 pips, pip value: $10/lot (EUR/USD, USD account).
Risk amount = $10,000 × 1% = $100
Lots = $100 ÷ (20 × $10) = 0.5 lots (50,000 units)