XAUUSD (Gold) Margin Calculator

Gold (XAUUSD) is one of the most-traded CFD instruments, but its margin behaves differently from a standard FX pair. A gold lot is sized in troy ounces, and the dollar price of gold moves in large numbers — so the margin a position ties up is highly sensitive to both your lot size and the current spot price. This calculator returns the exact USD margin a XAUUSD position requires the moment you open it, given your leverage.

How gold margin is calculated

The tool uses one formula:

margin = (lot size × 100 oz × gold price) / leverage

A standard gold lot is 100 troy ounces. So lot size × 100 gives you the total ounces controlled, multiplying by the gold price gives the notional value of the position in USD, and dividing by your leverage ratio gives the slice of that notional you must post as margin.

Because XAUUSD is quoted in USD, the margin comes out directly in USD — there's no extra account-currency conversion step the way there is for, say, EURGBP on a USD account. If your account is denominated in another currency, convert the USD result at the prevailing rate.

Worked example

You want to open 1 lot of XAUUSD with gold trading at $2,350 on 1:200 leverage:

margin = (1 × 100 × 2350) / 200
       = 235,000 / 200
       = $1,175

So you'd need $1,175 of free margin to open that position. The position controls $235,000 of gold (the notional), but at 1:200 you only fund 0.5% of it.

Change one input and the result moves predictably:

• Half the size (0.1 lot): (0.1 × 100 × 2350) / 200 = $117.50.
• More leverage (1:500): (1 × 100 × 2350) / 500 = $470.
• Lower price ($2,000): (1 × 100 × 2000) / 200 = $1,000.

Why leverage cuts margin but not risk

Higher leverage shrinks the margin required — at 1:500 the same lot needs $470 instead of $1,175 — but it does not shrink your exposure. Both positions still control 100 ounces, so a $10 move in gold gains or loses $1,000 either way (100 oz × $10). Leverage only changes how much capital is locked to hold the trade; the profit-and-loss swing per dollar of gold movement is identical. Treat the lower margin as freed-up capital, not as lower risk.

Edge cases and pitfalls

• Margin moves with price. Required margin is recalculated off the live gold price, so as XAUUSD rises your existing position's margin requirement rises too. A trade that was comfortable at $2,300 needs more margin if you add to it at $2,400. Always leave a buffer above the bare minimum.
• Margin is not your stop-loss. This figure is what's needed to open the position, not what you can afford to lose. Set position size from your risk-per-trade first, then check the margin fits — never the other way round.
• Mini and micro lots. Some brokers and prop accounts size gold differently (e.g. 10 oz "mini" contracts). This calculator assumes the standard 100 oz lot. If your contract spec differs, scale the lot input accordingly.
• Gold's volatility eats buffers fast. XAUUSD can move tens of dollars in minutes around data releases. Tight free-margin buffers that survive a quiet session can trigger a margin call during news — size with that in mind.

Trading gold on FXNX

FXNX lists gold across all four NX account types, with leverage up to 1:500 and raw spreads from 0.0 pips on NX Pro. Run your size here, then open the position on whichever account fits your style — agent-driven, raw/ECN, or flagship discretionary.