Forex Leverage Calculator 2026: Margin & Position Size Tool
The short answer
A forex leverage calculator works out the margin you must put up to open a trade and the effective leverage you are running on your account. Required margin equals the position’s notional value divided by your leverage, so a 100,000 unit position at a price of 1.10 with 1:30 leverage needs 110,000 divided by 30, about 3,667 in margin. The calculator below does it instantly: enter your trade size in lots, your leverage, the instrument price and, optionally, your account balance, and it returns your position size, notional value, required margin, the margin requirement as a percentage and your effective account leverage. The key risk number is effective leverage, your total position size divided by your account equity. Leverage does not increase your edge, it increases the size of every move on your balance, which is why position sizing, not the headline leverage cap, is what actually blows accounts.
Forex leverage and margin calculator
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Assumes a standard contract of 100,000 units and the instrument priced in your account currency (a common simplification; cross-currency pairs can vary slightly). Educational only, not advice.
How to use the leverage calculator
Enter four things and the calculator updates instantly. Trade size in lots, where one standard lot is 100,000 units. Your leverage, written as the X in 1:X, so type 30 for 1:30 or 500 for 1:500. The current price of the instrument you are trading. And, optionally, your account balance, which lets the tool show your effective leverage, the single most important risk number on the page. The tool then returns your position size in units, the notional value of the trade, the margin you must post to open it, the margin requirement as a percentage and your effective account leverage.
Leverage, margin and the number that actually matters
Leverage is just a ratio that lets a small deposit control a large position. Margin is the slice of your balance the broker rings off to hold that position. The headline leverage cap, 1:30 under tier-1 regulators like the FCA, far higher offshore, is not what blows accounts. Effective leverage is. That is your total open position size divided by your account equity, and it tells you how hard a normal market move hits your balance. A trader on a 1:500 account who sizes sensibly is safer than a trader on a 1:30 account who maxes out the margin. Size from your stop and your risk percentage first, then use this calculator to confirm the margin fits.
Pick the right leverage and broker
Different brokers offer very different leverage. Tier-1 regulated entities cap retail leverage near 1:30; offshore entities go higher. The desk’s stack, by what you need:
Frequently asked
What is a forex leverage calculator?
A forex leverage calculator works out the margin required to open a position and your effective account leverage. You enter your trade size in lots, your leverage ratio and the instrument price, and it returns the notional value, the margin you must post, the margin percentage and, if you add your balance, your effective leverage.
How do you calculate required margin?
Required margin equals the position’s notional value divided by your leverage. Notional value is your position size in units multiplied by the instrument price. For example, one standard lot is 100,000 units; at a price of 1.10 that is 110,000 notional, and at 1:30 leverage the margin is 110,000 divided by 30, roughly 3,667 in your account currency.
What is the difference between leverage and margin?
Leverage is the ratio that lets you control a large position with a small deposit, written as 1:30 or 1:500. Margin is the actual money set aside to hold that position, calculated as the notional value divided by the leverage. Higher leverage means a smaller margin requirement for the same position, and a larger effective exposure on your balance.
What leverage should I use in forex?
There is no single right number; what matters is your effective leverage, your total position size divided by your account equity, and the risk per trade that implies. Most blown accounts come from oversizing, not from the headline leverage cap. The desk sizes from the stop loss and risk percentage first, then checks the margin the leverage requires.
Is higher leverage more risky?
Higher leverage is not riskier by itself; it lowers the margin you must post. The risk comes from using that freed-up margin to take a bigger position. The same 1:500 account traded at the same position size as a 1:30 account carries the same risk. Risk is driven by position size relative to your equity, which is exactly the effective leverage this calculator shows.
Educational tool only, not financial advice. KenMacro has commercial partnerships with some brokers referenced and may earn a commission if you open an account, at no cost to you.
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