Tools Position size
Risk

Position size calculator

Set the maximum loss first. The calculator then sizes the trade after stop distance, commission, slippage, and your broker’s lot step.

Risk limit

Results update as you type. Costs are included in the loss-at-stop estimate.

Execution costs and margin
Broker-ready position size 0.46 lots

Rounded down to the selected lot step so the planned loss stays inside your limit.

Includes stop loss, commission, and slippage allowance.

Maximum risk
$100.00
Position units
46,000
Estimated margin
$1,686.67

Loss-at-stop allocation

How the risk budget is used

Risk budget allocation chart A stacked bar showing stop-loss risk, commission, slippage, and unused budget. Stop — Slippage — Commission — Unused — —

How the calculator sizes the trade

It divides your money risk by the expected loss per lot. That loss includes the stop distance, round-turn commission, and the slippage allowance. The result is rounded down to the broker’s lot step.

Lots = risk amount ÷ ((stop pips + slippage pips) × pip value + commission per lot)

Check these inputs at your broker

  • Contract size and minimum lot increment.
  • Round-turn commission, not one-way commission.
  • Pip value in your account currency.
  • Applicable leverage and margin method for the instrument.