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Margin & Leverage Calculator

How much of your own capital a leveraged position ties up, the notional it controls, and the effective leverage you are really running, the number that decides how hard a price move lands.

By , founder and editorUpdated

Notional value
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Required margin
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Effective leverage
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Margin / equity
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The formula

notional = contract size × lots × price
required margin = notional ÷ leverage
effective leverage = notional ÷ account equity

Notional is the full face value of what you control. One standard lot of EUR/USD at 1.09 is 100,000 × 1.09 = $109,000 of exposure. At 1:30 leverage the broker asks you to post 109,000 ÷ 30 ≈ $3,633 as margin, and returns it when you close. The notional is denominated in the quote currency; we convert margin to your account currency using daily ECB reference rates, so it reads in the units you actually fund the account in.

Effective leverage is the number that matters. Post that $3,633 margin from a $10,000 account and your effective leverage is 109,000 ÷ 10,000 ≈ 11x, even though the account is capped at 30x. An 11x position loses 11% of your equity for every 1% the price moves against you. The headline leverage sets a ceiling; the effective figure is what you are actually risking, and it is entirely your choice within that ceiling.

Using it to stay solvent

Margin is where leverage stops being abstract. The lower your effective leverage, the more room the position has to move against you before a margin call force-closes it. Traders who blow up rarely do so because their analysis was wrong once; they do so because effective leverage was so high that ordinary noise triggered liquidation before the thesis could play out. Size the trade with the position size calculator, confirm the pip math with the pip value calculator, and use this page to check that the resulting effective leverage leaves you a survivable buffer.

Frequently asked questions

Is margin a cost or a deposit?
A deposit, not a fee. Margin is the slice of your own capital the broker sets aside as collateral while a leveraged position is open; you get it back when you close. It is not money paid to anyone. What leverage does is let a small margin control a much larger notional position, which magnifies both gains and losses on your actual capital.
What is the difference between leverage and effective leverage?
Leverage (like 1:30) is the maximum the broker allows and sets the minimum margin. Effective leverage is what you are actually using: total position notional divided by your account equity. You can trade at 1:2 effective leverage inside a 1:30 account by using only a fraction of the available margin. Effective leverage, not the headline number, is what determines how a price move hits your account.
Why do regulated brokers cap leverage at 1:30?
Regulators in the EU, UK and Australia cap retail forex leverage (commonly 1:30 on majors, lower on volatile instruments) precisely because high effective leverage is how retail accounts blow up. Offshore brokers advertise 1:500 or more; the maths of a margin call arrives far sooner there. This calculator shows the margin at whatever leverage you enter so you can see the trade-off directly.
How does a margin call happen?
As a position moves against you, your equity falls while the required margin stays roughly fixed, so your margin level (equity divided by used margin) drops. Cross a broker threshold (often 100% for a warning, 50% for liquidation) and positions are force-closed. Lower effective leverage leaves more buffer before that happens; this tool shows how much notional a given margin controls so you can plan that buffer.

Method and limitations

Pure arithmetic on your inputs; margin is converted to your account currency using daily ECB reference rates baked into the site. Nothing is fetched during your visit and nothing you type leaves your browser. Contract sizes are pre-filled with common conventions and editable, and some brokers compute margin on tiered or instrument-specific rules rather than a flat divide, your broker's margin schedule is the authority. This is an information tool, not trading advice.

Data sources

This tool runs entirely in your browser. Nothing you enter is sent to us or stored.

For general information and education only. This is not financial advice and not a recommendation to buy or sell anything. Trading and investing carry risk, including the risk of losing more than your initial outlay. Always verify figures against your broker or the original source before acting on them.

Spotted an error? Email[email protected]and it will be corrected. Maintained byJoey van Diest.