How position sizing protects trading capital
A position-size calculation starts with the maximum amount you are prepared to lose if the stop loss is reached. Dividing that amount by the stop-loss distance and pip value produces an estimated lot size.
Position size formula
Risk amount = account balance × risk percentage. Standard lots = risk amount ÷ (stop-loss pips × pip value per standard lot). Confirm the actual pip value, contract specification and minimum lot increment with your broker.
Risk warning
Slippage, gaps, spreads and commissions can cause a loss greater than the planned amount. This calculator is educational and does not recommend a trade or risk percentage.