Calculators for every trade
Position size, pip value, risk to reward, margin, compounding and drawdown recovery, with your balance filled in.
Position size calculator
Find the exact lot size for your risk on forex pairs, gold, indices and crypto, so a stop loss costs what you planned and nothing more.
How the position size calculator works
Step by step
- Choose how much of your account you are willing to lose if the stop loss is hit, as a percentage or a fixed amount.
- Enter the distance from entry to stop loss in pips (forex) or points (gold, indices, crypto, oil). The calculator multiplies it by the value of one pip for one lot to find the cost of the stop per lot.
- Dividing your risk amount by that cost gives the position size. It is rounded down to your broker's lot step so you never risk more than planned.
Formula
Risk amount = balance × risk % ÷ 100 Pip value per lot = contract size × pip size × conversion rate Lots = risk amount ÷ (stop distance × pip value per lot)
Example
A $10,000 account risking 1% risks $100. On EURUSD with a 25-pip stop, one lot moves $10 per pip, so the stop costs $250 per lot. $100 ÷ $250 = 0.40 lots.
Questions about position sizing
What percentage should I risk per trade?
Many traders risk between 0.5% and 2% of the account per trade. Lower risk means smaller drawdowns during losing streaks and more time to learn.
Why does the calculator ask for a conversion price?
When the instrument is priced in a currency other than your account currency, the pip value has to be converted. Enter the current price of the pair shown and the calculator does the rest. No live prices are fetched.
Why is my broker's contract size different?
Brokers set their own contract sizes, especially for indices, metals and crypto. Edit the contract size and pip size fields to match your broker's specification.
How do I find the stop loss distance in pips?
Subtract the stop loss price from the entry price and divide by the pip size: 0.0001 for most forex pairs, 0.01 for yen pairs. For gold, indices and crypto use the point size shown in the calculator.
Is the number I type saved anywhere?
No. The calculation runs entirely in your browser and nothing is sent to our servers. If you copy the link to the result, the numbers live only inside that link.
Your size is ready. Now make it a habit
In JammalFX you log every trade with its planned risk, see your real win rate and expectancy, and size each position from your own balance, with the calculators one click away.