How much margin do I need to open this forex position at my broker's leverage?

Calculates the required margin in USD for a forex position from a currency pair type, position size in units, exchange rate, and leverage ratio.

How is this calculated?

Required margin equals the position's notional value in USD divided by the leverage ratio. When USD is the quote currency, notional value equals position size in units multiplied by the current exchange rate. When USD is the base currency, notional value equals position size directly, since the position is already denominated in USD.

Forex Margin Requirement Calculator

Enter Your Position

Currency pair type

This calculator covers major USD pairs. Cross pairs where neither currency is USD (EUR/GBP, EUR/JPY) need an extra conversion step this tool doesn't do.

Position size (units)

Standard lot = 100,000 units. Mini lot = 10,000 units. Micro lot = 1,000 units. Enter the exact unit count, not the lot count.

Current exchange rate

Required for every pair type here, since notional value is what margin is calculated on.

Leverage your broker offers (as X:1)

Enter just the number before the colon. Retail leverage caps vary by regulator: commonly up to 50:1 in the US, up to 30:1 for major pairs under UK/EU rules, and considerably higher at some offshore brokers. Check your own broker's actual terms.

Account balance (USD) — optional

Leave blank to skip. If entered, shows what percent of your account this trade's margin would use.

Your Result

Fill in the fields on the left and click Calculate to see the exact margin this position would require at your broker's leverage.

How this is calculated

Margin requirement is a percentage of the position's full notional value, not a separate fee. Leverage of 50:1 means the broker requires 1/50, or 2%, of the notional value as margin.
Notional value in USD is the position's full size measured in dollars. When USD is the quote currency (pairs like EUR/USD), notional value equals position size in units multiplied by the current exchange rate, since position size is denominated in the base currency. When USD is the base currency (pairs like USD/CAD or USD/JPY), position size is already denominated in USD, so notional value equals position size directly.
Required margin equals notional value divided by leverage. Higher leverage lowers the margin required to open the same position, and also increases how much a given price move affects your account in percentage terms.
Margin is not a loss or a fee, it's account equity your broker sets aside and can't be used for other trades while the position is open. It's returned when the position closes, minus or plus whatever the trade actually gained or lost.
Cross pairs where neither currency is USD, such as EUR/GBP or EUR/JPY, need a second conversion step that this calculator doesn't cover.

Risk & liability disclaimer: This calculator produces a mathematical estimate based on the numbers you enter, not live market data or your actual broker's margin rules. Exchange rates move continuously and this tool does not pull or refresh rates automatically. Actual margin requirements, leverage limits, and margin call rules vary by broker and jurisdiction, always confirm your broker's specific terms. This is not financial advice and does not guarantee any trading outcome. Trading Habits is not a broker-dealer, registered investment adviser, or tax professional, and is not affiliated with any broker, exchange, or data provider. Forex trading involves substantial risk of loss and is not suitable for everyone. You could lose some or all of the capital you trade with, and leveraged trading can amplify losses beyond your initial margin in some account types.

How much margin do I need to open this forex position at my broker's leverage?

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Your Result

How this is calculated

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