Forex Position Size Calculator
Find the correct lot size for any trade based on your account balance, risk tolerance, and stop-loss level. The single most important calculation in forex risk management.
Position Size Calculator
Results update instantly as you adjust inputs
= $100.00 at risk
The number of pips between your entry and stop-loss level
Results
Risk Amount
$100.00
1.00% of balance
Position Size
0.20
lots
Units
20,000
base currency units
Reference rates — verify with your broker
How to use
Enter account details
Select your account currency and enter your current balance.
Set your risk
Enter how much you're willing to risk — as a percentage (e.g. 1%) or fixed dollar amount.
Select pair & stop
Choose the currency pair and enter your stop-loss distance in pips.
Read position size
The calculator shows the exact lot size that keeps your risk within your limit.
Risk guide
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What is position sizing?
Position sizing is the method of determining how many lots to trade so that a losing trade costs you a fixed, predetermined percentage of your account balance — regardless of which pair you are trading or how many pips your stop is.
Without position sizing, traders often risk different dollar amounts on each trade without realising it. A 50-pip stop on EUR/USD costs a different amount to a 50-pip stop on GBP/JPY — the position size calculator removes that ambiguity entirely.
The formula is straightforward: Lots = Risk Amount ÷ (Stop Pips × Pip Value per lot). This calculator handles all the currency conversion for you.
Why it is the most important tool
Survive losing streaks
Capping each loss to 1% means 10 consecutive losses only reduces your account by ~10%, not 50%.
Remove emotion from sizing
There's no guessing — the number tells you exactly what to enter, every single time.
Consistent risk across pairs
Whether trading EUR/USD or XAU/USD, you always risk the same dollar amount per setup.
Scales with your account
As your balance grows or shrinks, position sizes adjust automatically to keep risk constant.
Example calculation
Scenario: 1% risk on EUR/USD
$100 ÷ (50 pips × $10/pip) = 0.20 lots · Max loss = $100 if stop hit
Trade with a structured edge
You have the risk management tools. Now add professional signals with clear entry, stop-loss, and take-profit levels — so every trade is fully planned before you execute.
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