Free tool

Position size calculator

Tell it what you are willing to lose and where your stop goes. It tells you the lot size — rounded to a volume your broker will actually accept.

Your numbers stay in your browser. The only request this page makes is for an exchange rate, and it carries nothing but two currency codes.

Your account
What you risk on this trade
Instrument
Broker volume limits

In MetaTrader these are the symbol's SYMBOL_VOLUME_MIN, SYMBOL_VOLUME_STEP andSYMBOL_VOLUME_MAX. Right-click the symbol → Specification.

The formula it uses

lots = risk money / (stop in pips x pip value per lot)

Pip value per lot is pip size x contract size, converted into your account currency when the symbol is not quoted in it. The article below walks through every term, including why a point and a pip are not the same thing on most brokers.

Read: how position size is calculated

Before you trade on this

  • Check the contract size against your broker. Gold, silver, indices and crypto vary between brokers more than they ought to. Use Custom if yours differs.
  • This does not include commission or swap. A round-turn commission is part of what a losing trade costs you.
  • Slippage and gaps can take more than your stop. The stop is where you intend to exit, not a guarantee of the price you get.
  • Exchange rates here are daily reference rates, not live quotes. They are fetched once and are good to a fraction of a percent, which moves the lot size by a fraction of a percent. If you need the exact live rate, type it in.
  • Nothing here is financial advice. It is arithmetic. What you risk is your decision.