Lot Size Calculator
Enter your balance, how much you are willing to risk and your stop loss in pips — the calculator suggests a lot size that keeps the loss inside your risk limit.
How is this calculated?
Lots = risk amount ÷ (stop-loss pips × pip value per lot)
- The risk amount is your balance multiplied by your risk percentage.
- The raw lot size divides that risk by the money you would lose per lot if the stop loss is hit.
- The result is always rounded down to the nearest 0.01 lot so your real risk never exceeds the plan.
Frequently asked questions
How do I calculate my lot size?
Divide the money you are willing to lose by the stop-loss distance in pips times the pip value per lot. The calculator does this for you and rounds down to a tradable lot step.
Why is the result rounded down?
Rounding the lot size up would make your actual risk larger than the percentage you chose. Rounding down guarantees the trade risks slightly less than planned.
How much should I risk per trade?
A common rule for retail traders is 1–2% of the account balance per trade. This is a widely used convention, not advice — the calculator lets you enter any percentage.
Related calculators
- Pip CalculatorWork out the exact value of one pip in any currency pair and account currency. Standard, mini and micro lots supported. Free and instant.
- Position Size CalculatorCalculate forex position size from your entry, stop loss and risk percentage — and see the risk/reward ratio and potential profit at your take profit.
Related guides
- How to Calculate Forex Lot SizePosition sizing in four steps: pick a risk percentage, measure your stop in pips, find the pip value, and let the lot size fall out of the math.
- What Is a Pip in Forex?A pip is the standard unit for measuring price moves in forex. Here is what it means, how it is counted on each currency pair, and why pip value changes with your position size.
Results are estimates, not financial advice. Actual broker conditions may differ.