Free Tool

Lot Size Calculator

POSITION SIZING FOR FOREX & GOLD TRADERS
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// Lot Size by Risk Percentage
$
%
0.5% 1% 1.5% 2%
pip
10 20 50 100
Lot Size
–lots
Risk Amount
–
Max Loss (SL hit)
–
Units Traded
–
// Lot Size by Fixed Dollar Risk
$
pip
$
Lot Size
–lots
% of Account
–%
Verified Loss
–
Pip Value
–
// FTMO Safe Lot Size — Stays Within 5% Daily Limit
trades
pip
Max Safe Lot Size
–lots
Daily Loss Limit
–
Risk Per Trade
–
Buffer Remaining
–
// Lot Size Comparison — Same Risk Across Pairs
$
%
pip
PairPip ValueLot SizeUnitsVerify Loss
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How Lot Size Calculation Works

Lot size = Risk Amount ÷ (Stop Loss in pips × Pip Value per lot). For EUR/USD with $100 risk, 20-pip SL: Lot = $100 ÷ (20 × $10) = 0.50 lots. This keeps every trade at exactly the same dollar risk regardless of SL distance.

FAQ

What is a standard lot in forex?
A standard lot = 100,000 units of base currency. A mini lot (0.10) = 10,000 units. A micro lot (0.01) = 1,000 units. For EUR/USD: 1 standard lot pip value = $10. For XAU/USD gold: 1 standard lot = 100 oz, pip value = $1.
What percentage should I risk per trade?
Most professional traders risk 0.5–2% per trade. For FTMO challenges: 0.5–1% is recommended, allowing 5–10 losing trades before hitting the 5% daily limit. Risking 2% means only 2–3 losing trades before you must stop for the day. Lower risk % = more trades before hitting limits = more opportunities.
Why is XAU/USD lot size calculation different?
Gold's pip value is $1/lot (vs $10/lot for EUR/USD). This means for the same SL distance in pips, gold requires 10× more lots than EUR/USD. However, gold typically has much larger SL distances (100–300 pips vs 20–50 pips for forex), so the final lot size ends up being smaller. Always use the correct pip value for each instrument.

* Pip values are approximate and vary with live exchange rates. Verify with your broker before trading. Not financial advice.