Position Size Calculator

Calculate the ideal position size based on your account balance and risk management rules.

Inputs

Account Balance (USD)

Risk % per trade

Most traders use 1–2%.Stop Loss (pips)

Instrument

How position sizing works

Position size = (Account × Risk%) ÷ (Stop in pips × Pip value per lot). The calculator uses the contract specification of the selected instrument to convert lots to units. For crypto and indices we treat one unit as one contract.

Pair this tool with the risk calculator to sanity-check the dollar risk before sending the order.

Keep learning

Read Position Sizing or browse the Risk Management guides on RealMarketAPI Learn.

Build with live prices

Feed calculations like this with real-time forex, gold and crypto prices from RealMarketAPI. Get a free API key or read the docs.