Free tool
Lot size calculator
Pick your pair, account size, risk per trade and stop-loss distance — we return the exact MT5 lot size that keeps you inside the drawdown rules.
This is an approximate calculator. Real values may differ slightly depending on your broker's contract specifications, spreads, swaps and live price feed.
Recommended lot size
0.50
lots on EUR/USD · 20 pip stop
Risk budget$100.00
Actual risk at this lot$100.00
Pip value per 1.00 lot$10.00
Position value$54,500.00
Margin @ 1:100$545.00
Your daily drawdown limit on this account is $500.00 (5% of equity, rolling 24h — floating PnL counts). Max overall drawdown is 10% ($1,000.00). Keep total open risk well below the daily limit; three losers at 1% each is $300.00.
How the calculation works
Lot size = (account size × risk %) ÷ (stop loss in pips × pip value per lot). Pip value is derived from the contract size and pip step of the instrument — for USD-quoted pairs it is fixed ($10 per pip on a standard FX lot, $10 per 0.1 move on gold), and for USD-based pairs such as USD/JPY it is divided by the current price. Results are rounded down to 0.01 lots so you never risk more than intended.