← Lab

Forex position sizer

ForexRuns in your browser
0.0001 for most pairs. 0.01 for anything quoted in JPY.
Standard 100000 · mini 10000 · micro 1000.
1 when the pair's second currency is your account currency, e.g. EUR/USD on a USD account.
Position size0.40lots, rounded down to the 0.01 a broker will actually accept
Exact size before rounding0.4000 lots
Units40,000
Pip value at this size4.00
Risk you intended100.00
Risk you actually take100.00after rounding down — always at or under the intended figure
Actual risk1.00%
Reward : risk2.00
Break-even win rate33.3%

Arithmetic, not advice. It sizes a position from numbers you type — it has no market data, no view on any instrument, and no idea whether your stop is sensible. Nothing you enter leaves your browser. Check the pip size and the conversion rate before you trust the size — a JPY pair uses 0.01, and getting that one field wrong sizes the position a hundred times off.

Two fields decide everything

Pip size. 0.0001 for most pairs, 0.01 for anything quoted in yen. Getting this one wrong sizes the position a hundred times off, in the direction that empties an account.

Quote → account rate. Pip value lands in the pair's second currency, and this converts it to yours. It's 1 when they're the same — EUR/USD on a dollar account. It isn't 1 for USD/JPY on a dollar account, and it isn't 1 for anything on a euro account.

The size is rounded down to the 0.01 lot a broker will accept, never up, so the risk you actually take always lands at or under the risk you chose. Both numbers are shown, because the gap between them is the thing people assume away.