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Gold Lot Size Calculator (XAU/USD)

Size a gold position using actual entry and stop prices. Set your contract size, account currency and lot limits before calculating.

Free to use · No sign-up · Calculations stay in your browser

Enter your assumptions

Replace the examples with the specification you want to examine. All money inputs except the entry and stop use your selected account currency. Inputs stay in your browser.

Account currency

Direction

Account amount (USD)Use balance or equity consistently with your risk plan.

Risk budget (%)An example percentage, not a recommended risk level.

Entry price (USD per ounce)Hypothetical executable entry, not a live quote.

Stop price (USD per ounce)The intended exit price; slippage can worsen execution.

Contract size (troy ounces per lot)Check the exact symbol specification. Do not assume all gold products use 100.

Lot incrementValid sizes are whole multiples of this increment.

Minimum lotsMust be a multiple of the lot increment.

Maximum lotsAn editable example cap; use your broker’s limit.

Cash cost reserve (USD)A fixed allowance, not a predicted fee. Zero excludes costs.

The calculation, explained

Formula and worked example

Lots = (risk budget − reserve) ÷ loss per lot in account currency

At 100 troy ounces per lot, an entry of USD 2,400 and a stop of USD 2,390 create USD 1,000 of price loss per full lot. A USD 100 budget fits 0.10 lot before costs. With a USD 5 reserve, rounding down to 0.01 increments gives 0.09 lot.

Start with what 0.01 lot of gold means to connect lots, ounces and price exposure. Then see gold profit and loss examples.

Common questions

Can I use this for gold futures or physical gold?

No. This model is for a linear, USD-quoted gold position expressed in lots. Futures, options, ETFs and physical ownership have different specifications.

Does the calculated stop loss cap my loss?

No. Gaps, slippage, currency conversion and fees can make the actual loss greater. An ordinary stop is not a guaranteed execution price.

Sources and limitations

Prepared by InsomniCapital. Our editorial approach. Checked 2 October 2026.

Educational information only. Actual costs, execution, rates and product specifications can differ. Leveraged trading can result in substantial losses. Read the risk disclosure.