Gold Lot Size Calculator (XAUUSD Position Sizer)
How this calculator works
Position sizing on gold answers one question: how many lots can I trade so that if my stop-loss is hit, I lose only the amount I planned? The math:
- Dollar risk = balance × risk % (e.g. $1,000 × 1% = $10)
- Loss per lot = stop distance in $ × 100 oz (a $10 stop = $1,000 per full lot)
- Lot size = dollar risk ÷ loss per lot ($10 ÷ $1,000 = 0.01 lots)
We always round down — rounding up risks more than you planned.
Quick reference table ($10 stop-loss)
| Balance | 1% risk | 2% risk |
|---|---|---|
| $500 | — (below 0.01) | 0.01 lots |
| $1,000 | 0.01 lots | 0.02 lots |
| $5,000 | 0.05 lots | 0.10 lots |
| $10,000 | 0.10 lots | 0.20 lots |
Frequently asked questions
How do I calculate lot size for XAUUSD?
Risk in dollars ÷ (stop-loss in dollars × 100). Risking $20 with a $10 stop = 20 ÷ 1,000 = 0.02 lots.
How much is 0.01 lots on gold?
1 ounce — every $1 move in gold changes your P/L by about $1. The smallest size most brokers allow.
What risk percent should I use?
1–2% per trade is the disciplined norm. It keeps losing streaks survivable.
Round up or down?
Always down to the nearest 0.01 — rounding up quietly over-risks.
MT4 and MT5?
Yes — the 100 oz/lot standard is the same on both at most brokers; check your broker's contract specification to be sure.
Related
- Gold Pip Value Calculator · Risk & Drawdown Calculator · Gold Session Clock
- How much money do you need to start a gold EA?
- Gold EA risk management: settings that protect you
Want the sizing handled automatically?
Our free gold EA applies risk-based lot sizing with a fixed stop-loss on every trade.
Get the Free Gold EA →Educational tool only, not financial advice. Assumes the standard 100 oz XAUUSD contract — verify your broker's specification. Trading gold carries substantial risk of loss.