Margin Calculator

Margin is the amount of money your broker locks up as collateral to open and maintain a leveraged position. It's not a fee or transaction cost — it's a portion of your account equity set aside to cover potential losses. For example, with 100:1 leverage, a 1-standard-lot EUR/USD trade ($100,000 notional value) requires roughly $1,000 in margin. Understanding margin is crucial because if your account equity falls below the margin requirement, your broker may issue a margin call or close your positions. Our margin trading guide explains everything you need to know about how margin works in practice.

Leverage and margin have an inverse relationship — higher leverage means lower required margin for the same position size. At 100:1 leverage, you need 1% of the trade's notional value as margin. At 50:1, you need 2%, and at 500:1, only 0.2%. While higher leverage lets you open larger positions with less capital, it also amplifies both gains and losses, making your account more vulnerable to rapid drawdowns. Use our leverage calculator to explore how different leverage levels affect your margin requirements. For a balanced perspective, read our article on why higher leverage isn't always better.

Used margin is the total amount currently locked up to maintain all your open positions. Free margin is the equity in your account that is not being used as margin — this is the amount available to open new trades. Margin level is expressed as a percentage: (equity / used margin) × 100. Brokers use margin level to determine whether to issue a margin call (typically when it falls below 100%) or trigger a stop-out (when it falls to a specific level, often 50% or 20%). Monitoring these three values helps you avoid unexpected position closures. Our margin call guide breaks down each concept with examples.

The margin formula is: Notional Value / Leverage. The notional value is the lot size multiplied by the contract size (100,000 for a standard lot). For pairs where USD is the base currency (like USD/JPY), this calculation is straightforward. For pairs where USD is the quote currency (like EUR/USD), the notional value is converted at the current exchange rate. For cross pairs (like EUR/GBP), both the exchange rate and the conversion to your account currency come into play. Our margin calculator handles these conversions automatically based on the pair and leverage you select. You can verify pip values with our pip calculator for a complete trade planning workflow.

A margin call occurs when your account equity drops close to the used margin level, meaning you no longer have sufficient free margin to cover potential losses. Your broker will typically notify you and may ask you to deposit more funds. If the equity falls further, the broker will start closing your positions automatically (a stop-out) to prevent your account from going negative. To avoid margin calls, never use your full available margin, keep leverage reasonable, use proper stop losses with our lot size calculator, and monitor your free margin before opening new positions. Our margin call explained article walks through real scenarios.

Margin and stop losses serve entirely different purposes. Margin is collateral your broker requires to open a leveraged trade — it's about ensuring the broker is protected. A stop loss is an order you place to automatically close a trade at a predetermined price level — it's about protecting your own capital from excessive loss. Margin doesn't limit your losses; it only determines how much capital you need to open a position. A stop loss, on the other hand, defines your maximum acceptable loss on a trade. You should always use both: proper margin management to avoid margin calls and stop losses to control risk. Learn about stop loss placement in our stop loss guide.

Prop firms typically provide simulated accounts with fixed buying power rather than traditional margin-based leverage. Instead of depositing capital and using leverage, you're given a set account size (e.g., $100,000) with rules about maximum position sizes and drawdown limits. This means traditional margin calculations don't directly apply, but understanding margin concepts is still valuable because the same principles of overleveraging and position sizing apply. Prop firms evaluate your risk management, and traders who understand margin dynamics tend to perform better. For more on prop firm specifics, check our prop firm guide.

No, this calculator provides an educational estimate of the margin required to open a leveraged position based on standard formulas. Actual margin requirements may vary between brokers, account types, and market conditions. The calculator does not account for weekend margin requirements, which are typically higher, or special conditions during high-volatility events. Always verify margin requirements directly with your broker before opening positions. This tool is for informational purposes only and should not replace professional financial guidance or your own due diligence.