Free lot size calculator

Size every trade to the exact risk

Whether you trade a personal broker account or a prop challenge, enter your balance, risk per trade, and stop distance to get your exact lot or contract size in seconds.

Trade setup

What are you trading?1 lot = 100 oz. 1 pip = $0.10 move, so a 50 pip stop is a $5 move.Account balance ($)

Set your risk in

Risk per trade (%)Stop loss (pips)

$ per pip on 1 lotPre-filled for standard contracts. Adjust if your broker uses a different contract size.

Enter your stop distance

Add your stop loss in pips on the left to calculate your exact lot size.

Losing streak buffer at 1% risk per trade

Losses in a row to reach -10%11
Losses in a row to reach -20%23
Losses in a row to reach -50%69

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See your real risk on every trade

Alpha Journal logs your actual R-multiple, losing streaks, and risk drift across any broker or prop account.

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Figures are estimates to help you plan your risk and targets. Always verify your broker or prop firm rules before trading. Not financial advice.