Margin calculator
Required margin = (trade size × price of base) ÷ leverage. Covers forex pairs, crypto, stock CFDs, and major indices.
Notional (USD)
110 000
Required margin (USD)
3 666,67
How to use this calculator
Margin is the deposit your broker holds while you have an open position. It is not a fee; it is collateral returned when the trade closes. The formula is:
Required Margin = (Trade Size × Price) ÷ Leverage
Inputs explained: Forex
- Instrument: the currency pair. Selecting one pre-fills a typical price.
- Trade size: units of the base currency. 1 standard lot = 100,000 units; 0.1 lot = 10,000 units.
- Leverage: e.g. enter 30 for 30:1. Retail forex leverage is typically 20–500:1 depending on regulation.
- Price: the current exchange rate for the base currency in your account currency. For EUR/USD with a USD account, enter the EUR/USD rate.
- Account currency: the currency your broker account is settled in.
Worked example
Buy 1 standard lot of EUR/USD (100,000 units) at 1.10 with 30:1 leverage.
Notional = 100,000 × 1.10 = $110,000
Required margin = $110,000 ÷ 30 = $3,667