Lot Size Calculator
The lot size calculator determines the exact forex lot size to trade based on your account size, risk percentage, stop loss distance in pips, and currency pair. Proper lot sizing ensures you never risk more than your planned amount per trade, regardless of how wide your stop loss needs to be.
Uses indicative pip values. Actual pip values vary with live rates.
Distance from entry to stop in pips
Lot Size
0.5000
Standard Lots
0 lots
Mini Lots (0.1)
5.0 mini lots
Micro Lots (0.01)
50 micro lots
Dollar Risk
$100.00
How to use this calculator
- 1
Enter your account size
Your total trading account equity in dollars.
- 2
Set your risk percentage
The percentage of your account you are willing to risk. 1–2% is standard for professional traders.
- 3
Enter your stop loss in pips
The distance from your entry to your stop loss, expressed in pips.
- 4
Select your currency pair
The pip value varies by pair and current exchange rate. This calculator uses indicative pip values.
- 5
Read your lot size
The result is shown in standard lots, mini lots, and micro lots so you can enter any broker's order form.
Formula
Lot Size = Dollar Risk ÷ (Stop Pips × Pip Value per Lot)
Dollar Risk = Account Size × (Risk % ÷ 100)
Pip Value per Lot ≈ $10 for most USD quote pairs (standard lot)Calculate your dollar risk, then divide by the total pip risk. The total pip risk is your stop loss in pips multiplied by the pip value per standard lot for your currency pair. The result is your position size in standard lots. Divide by 0.1 for mini lots, or 0.01 for micro lots.
Worked Example
Account size: $10,000 Risk: 1% = $100 Pair: EUR/USD (pip value = $10 per standard lot) Stop loss: 20 pips Lot Size = $100 ÷ (20 × $10) = $100 ÷ $200 = 0.5 lots You should trade 0.5 standard lots = 5 mini lots = 50 micro lots. If your stop triggers (20 pip loss), you lose exactly $100 — 1% of account.
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