Gold is the instrument where a forex-sized position does the most damage. One lot of XAU/USD is 100 ounces, a $1 move is $100 per lot, and gold routinely moves $20–40 in a day — so a lot size that is comfortable on EUR/USD can lose a month of profit in an afternoon on gold. This calculator uses gold's own contract maths: enter your balance, risk and stop, and it returns the lot size that keeps one loss where you want it.
XAU/USD contract facts
| Item | Value |
|---|---|
| Standard lot | 100 troy ounces |
| Mini / micro lot | 10 oz / 1 oz |
| Price move of $1.00, 1 lot | $100 |
| Price move of $0.10 ("pip" on most brokers), 1 lot | $10 |
| Price move of $0.01, 1 lot | $1 |
| Typical spread | $0.15–0.40 on ECN accounts |
| Typical daily range | roughly $20–40; far more around Fed decisions and geopolitical headlines |
| Most liquid hours | London open through New York close; New York is the deepest session |
The calculator on this page defines a pip as $0.10 — the convention on most MT4/MT5 brokers — so a "30-pip" stop is a $3.00 stop. If your broker shows gold to two decimals and counts the last digit as a pip, multiply your pip count by ten before entering it.
The lot size formula for gold
Lot size = (Account balance × Risk %) ÷ (Stop in $ × $100)Or, in the calculator's units: (Balance × Risk %) ÷ (Stop in $0.10 pips × $10).
Example 1 — $10,000 account, 1% risk, $3.00 stop (30 pips):
- Risk amount: $100
- Loss per lot: $3.00 × $100 = $300
- Lot size: 0.33 lots
Example 2 — $5,000 account, 1% risk, $8.00 stop (80 pips):
- Risk amount: $50
- Loss per lot: $800
- Lot size: 0.06 lots
Example 3 — $100,000 prop-firm account, 0.5% risk, $5.00 stop (50 pips):
- Risk amount: $500
- Loss per lot: $500
- Lot size: 1.00 lot
Quick reference: gold lot size at 1% risk
| Account | $2 stop | $3 stop | $5 stop | $10 stop |
|---|---|---|---|---|
| $1,000 | 0.05 | 0.03 | 0.02 | 0.01 |
| $5,000 | 0.25 | 0.17 | 0.10 | 0.05 |
| $10,000 | 0.50 | 0.33 | 0.20 | 0.10 |
| $50,000 | 2.50 | 1.67 | 1.00 | 0.50 |
| $100,000 | 5.00 | 3.33 | 2.00 | 1.00 |
Halve for 0.5% risk; double for 2%.
What makes gold different from a forex pair
- The dollar value of a move is ten times a major. A 30-pip loss on EUR/USD at 1 lot is $300. A $3.00 move on gold at 1 lot is also $300 — but gold covers $3.00 in minutes on an ordinary day.
- The range is measured in dollars, and it is wide. $20–40 a day means a $2 stop on a 15-minute chart is inside the noise. Most intraday gold traders use $3–8; swing traders $15–40.
- Spread is a bigger share of the stop. A $0.30 spread on a $3.00 stop is 10% — add it before sizing. Around Fed decisions the spread can widen to $1 or more.
- It gaps. Gold reacts to weekend geopolitical news and opens Monday with a gap. A weekend position needs a stop that survives the gap, and a size that survives the stop being skipped.
- US real yields and the dollar drive it. Fed decisions, US CPI and payrolls produce the largest moves; a rise in real yields is a headwind, a fall is a tailwind. The economic calendar matters more here than on most pairs.
Common gold sizing mistakes
- Using forex lot sizes. 0.5 lots on EUR/USD is a normal position for a $10,000 account; 0.5 lots on gold with a $5 stop is a 2.5% risk.
- Confusing pips with dollars. A "50-pip" stop is $5.00 on a broker that counts $0.10 as a pip and $0.50 on one that counts $0.01. Check which one yours uses.
- Stops inside the spread's news-hour range. A $1.50 stop during the Fed press conference is a coin flip on the spread alone.
- Adding to a loser in a trending move. Gold trends hard intraday; averaging into a $10 move against you doubles the position at the worst moment.
- Ignoring margin. At $2,500 an ounce, 1 lot is a $250,000 notional. Even at 1:100 leverage that is $2,500 of margin — a quarter of a $10,000 account tied up in one trade.
Setting a gold stop loss
The stop should come from the chart or from volatility, never from the lot size you want to trade. A common approach is an ATR-based stop — 1 to 1.5 times the 14-period ATR on your trading timeframe — which on a 15-minute chart is often $2–4 and on a 4-hour chart $10–20. Once the stop is set, this calculator gives the lot size that makes that stop cost exactly the percentage you chose. For a walkthrough with worked examples, see the XAU/USD stop loss calculator.
Track your gold trades in Fips
Fips's free trading journal records every gold trade with its dollar result, R-multiple and session, which quickly shows whether your stops are too tight for gold's range. Connect an MT4, MT5 or cTrader account and trades import automatically. Backtest a gold setup on historical data to find its worst losing streak before you size it live, and use the economic calendar to keep Fed and US inflation dates in view.
Frequently asked questions
How much is 1 pip on XAU/USD?
On most brokers a pip is a $0.10 move and is worth $10 per lot; a $1.00 move is worth $100 per lot. Some brokers count $0.01 as a pip ($1 per lot). Check your platform's contract specification.
What lot size should I use on a $10,000 gold account?
At 1% risk and a $3 stop, 0.33 lots. At a $5 stop, 0.20 lots. At a $10 stop, 0.10 lots.
What is a reasonable stop loss on gold?
Intraday setups commonly use $3–8, 4-hour setups $10–20, daily setups $25–50. An ATR-based stop adapts to current volatility; size the position after the stop is set.
Can I trade gold on a $1,000 account?
At 1% risk and a $3 stop, 0.03 lots — 3 ounces. Most brokers allow 0.01-lot increments, so it is possible, but the margin requirement at current prices is significant relative to the account.