First you decide how much you're allowed to lose on a trade, and only then how much to buy. This calculator does that math.

How much money is in the trading account

What percentage of the account you're allowed to lose on this trade

How far the stop is from the entry price

Result

Position size

5,000
Maximum loss
100

The light on the result gets stronger as the risk goes up.

How it's calculated

Position size = (account × risk) ÷ distance to stop

This is a calculator, not investment advice. Terms of use