XAUUSD Lot Size Calculator: How to Size a Gold Trade

To calculate XAUUSD lot size, divide your cash risk budget by the estimated entry-to-stop loss on one lot of your broker's gold contract. A useful gold position size calculator needs the contract specification as well as the account balance and stop distance.

Searching for “what is one pip in gold?” often causes confusion because traders and platforms use that word differently. Work in actual price distance, tick size, and tick value instead.

Find the gold contract specification first

In desktop MetaTrader 5, locate your broker's gold symbol in Market Watch and open its Specification. The official Market Watch guide explains this interface.

Record the exact symbol, contract size, tick size, tick value, minimum volume, and volume step. Check the account currency too. A broker may label gold XAUUSD, XAUUSD.m, or something else; a similar label does not prove identical trading conditions.

Use the contract size calculation below only where it matches the broker's profit calculation. For other specifications, use the tick-based formula and verify against the broker's estimated profit/loss.

Worked XAUUSD position sizing example

Assume a hypothetical USD account with a $5,000 balance. An illustrative 0.5% risk budget equals $25. Suppose a gold long has an entry of $2,400 and a stop of $2,395, giving a $5 price distance per ounce. These are example prices, not a current gold quote.

Assume the broker specifies 100 troy ounces per lot, with a 0.01-lot minimum and step. For this example:

Loss per lot = $5 × 100 ounces = $500

Calculated lots = $25 ÷ $500 = 0.05 lots

That position represents five ounces. A $5 adverse move would produce an estimated $25 loss before costs, assuming execution at the specified prices.

Gold lot size and stop distance table

The following table keeps the $25 budget and the hypothetical 100-ounce lot specification unchanged:

Entry-to-stop distance	Loss per 1 lot	Raw lots	Lots rounded down to 0.01	Planned price loss
$2	$200	0.125	0.12	$24
$5	$500	0.050	0.05	$25
$10	$1,000	0.025	0.02	$20
$20	$2,000	0.0125	0.01	$20
$30	$3,000	0.0083	Below minimum	Skip

The last row matters. A minimum 0.01 lot would risk $30 from price movement alone, exceeding the $25 budget. Rounding up would break the rule the calculator is supposed to enforce.

Cross-check with tick value

If the specification shows a $0.01 tick size and $1 tick value per lot, a $5 stop contains 500 ticks. Multiplying 500 by $1 gives the same $500 loss per lot. MetaQuotes lists these fields in its symbol properties documentation.

If the two methods disagree, stop and resolve the mismatch. It could involve account-currency conversion, contract settings, or an incorrect interpretation of points and ticks. Do not average the answers.

Costs and execution still matter

Check spreads, commissions, overnight charges, and available margin separately. Include the relevant bid and ask sides when estimating entry-to-exit loss, and avoid counting the spread twice if it is already reflected in those prices. Fast movement can create slippage beyond the planned stop.

TickerAI can read supported broker specifications when sizing an executable gold idea. Ask it to show the inputs and verify them against your MT5 account before sending an order. See the forex sizing guide for the general formula and the economic calendar guide for checking scheduled releases before a trade.

All figures are hypothetical educational examples. Gold trading involves loss risk; calculated stop-based risk is an estimate.