Free trading tool
Position size calculator:the right lot size, every trade.
Position sizing is the one variable that's entirely in your control. Set your balance, your risk per trade and your stop-loss distance, and this works out exactly how many lots to trade.
Account balance
$
Risk per trade - 1%
Stop-loss distance (pips)
Instrument
Amount at risk
$100
Position size
0.50 lots
50,000 units
Value per pip at this size
$5.00
How it works
The formula behindthe numbers.
Position size is the amount you risk divided by the distance to your stop loss, converted into lots.
Amount at risk is your account balance multiplied by the percentage you're willing to risk on a single trade - most professional traders keep this between 0.5% and 2%.
Position size is that dollar amount divided by your stop-loss distance in pips, multiplied by the pip value of the instrument you're trading. Get this right and every trade - win or lose - costs the same fraction of your account, which is what keeps a single bad trade from doing lasting damage.
Worked example. On a $100,000 account risking 1%, the amount at risk is $1,000. With a 25-pip stop on EUR/USD, where one standard lot is worth about $10 per pip, that is $1,000 ÷ (25 × $10) = 4 lots. Widen the stop to 50 pips and the same $1,000 of risk buys 2 lots - the risk stays fixed and the size moves to fit it.
Pip values shown are indicative approximations for a representative exchange rate, not a live feed. Always confirm the exact figure with your broker before sizing a real trade.
Common questions
Position sizing,answered.
How do I calculate lot size?
Multiply your balance by your risk percentage to get the dollar amount at risk, then divide it by your stop-loss distance in pips times the pip value of one lot. The result is your size in lots.
How much should I risk per trade?
Most disciplined traders risk between 0.5% and 2% of the account on a single trade. On a prop firm account, size so that a normal losing streak stays well inside the daily loss limit and the maximum drawdown.
Does position size change with the stop loss?
Yes - that is the point of it. A wider stop means a smaller position and a tighter stop a larger one, so the amount you lose when the stop is hit stays the same.
Is a lot the same on gold and indices?
No. A standard forex lot is 100,000 units of the base currency, but gold and index contracts are specified per instrument, so their pip or point value differs. Gold is built into the calculator above; for anything else, check the contract size with your platform.
Ready when you are
Your capital stays yours.The risk is ours.
One evaluation fee, no time limits and up to 90% of simulated profits. Pick an account size and your credentials arrive by email within minutes.
No subscriptions or hidden fees
Payouts every 14 days
$400,000 max total allocation