Free tool — no account

Forex position size calculator

Work out the lot size that risks exactly the amount you intended.

Works without an account Formula printed with the answer Assumptions listed No live price hardcoded

Instrument

Pip size and contract size are taken from the published specification table.

Account currency

Account balance

The money in the account, in the account currency above. Unit: account currency.

Risk per trade

Most risk plans sit between 0.5% and 2%. Nothing here recommends one. Unit: %.

Stop-loss distance

Distance from entry to stop, counted in this instrument's pips. Unit: pips.

Quote → account exchange rate (optional)

Only for a cross pair. Only when the instrument is priced in a currency other than your account currency. Enter the rate your platform shows; it is never looked up or assumed.

Rate valid at (UTC) (optional)

Only for a cross pair. Stamped on the result so the conversion stays honest about its source.

Broker lot step (optional) (optional)

The answer is always rounded DOWN to this step, so actual risk can only be less than requested.

Broker minimum lot (optional) (optional)

Nothing is stored or emailed. The maths runs on the figures you typed.

What this tells you

Position size comes from three numbers you control: how much is in the account, what percentage of it you are willing to lose on this idea, and how far away your stop loss is. Everything else is derived.

Method

Risk amount = balance × risk percentage. Lot size = risk amount ÷ (stop-loss in pips × pip value per lot). The result is floored to the broker minimum lot step, never rounded up. If the minimum tradeable lot already risks more than your stated amount, the tool says so instead of quietly oversizing you.

Where the numbers come from

Contract sizes, pip conventions and session hours come from one published specification table, and the same class answers on the page and through the API. A conversion rate is only ever the figure you enter — the site does not fetch a price, because a hardcoded quote would be wrong for your broker and stale in seconds.

All twelve tools

Forex position size calculator — questions

Why is my lot size floored?

Brokers only accept lots in fixed steps, usually 0.01. Rounding up would risk more than you chose, so we round down and show the risk you are actually taking.

Does this use live prices?

No. It uses the contract specifications published on this page and the stop distance you enter. Price data is never needed to size a trade from a stop distance.

Forex position size calculator

Forex position size calculator — questions

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