Free Forex Margin Calculator —
Know Your Margin Before You Trade
Calculate exactly how much margin your broker requires before you open any leveraged forex position. Protect your account from unexpected margin calls.
How to Use the Margin Calculator
60-second walkthrough tutorial
Calculator Parameters
This is the amount your broker will lock to open 1.00 lot EUR/USD at 1:30 leverage.
Total Trade Value
$0
The actual size of your position in the market.
Leverage Ratio
1:30
You are controlling $30 for every $1 of margin.
The Exact Margin Formula Explained
Brokers calculate your required margin using a very specific formula. Once you understand the math, you will never be surprised by a rejected trade due to insufficient funds again.
The Universal Formula
Required Margin =
(Lot Size × Contract Size × Open Price) ÷ Leverage
Contract Size: In forex, 1 Standard Lot is always equal to 100,000 units of the base currency (the first currency in the pair).
Example 1: EUR/USD (USD Account)
- Trade: 1 Standard Lot (100,000 units)
- Price: 1.0850
- Leverage: 1:30
- (1 × 100,000 × 1.0850) ÷ 30 = $3,616.66
Example 2: USD/JPY (USD Account)
- Trade: 0.1 Mini Lot (10,000 units)
- Price: 151.20 (Doesn't affect USD base margin)
- Leverage: 1:100
- (0.1 × 100,000 × 1.00) ÷ 100 = $100.00
Understanding Your Margin Level Percentage
Calculating required margin is only step one. Once your trade is live, the most important metric on your MT4/MT5 terminal is the Margin Level (%).
> 100%
Healthy Status
Your equity is greater than your used margin. You have Free Margin available to open new trades or comfortably absorb floating losses.
100%
The Margin Call
Your equity exactly equals your used margin. Your broker issues a Margin Call. You cannot open any new positions until you deposit more funds or close existing trades.
≤ 50% (or 20%)
The Stop Out
Your losses have depleted your equity to the broker's critical threshold. The broker will automatically liquidate your largest losing positions to protect against a negative balance.
Leverage vs Margin Requirements Reference
See how leverage drastically alters the capital required to open a 1 Standard Lot ($100,000) position.
| Leverage Ratio | Margin Requirement % | Margin for 1 Lot ($100k) | Risk Profile |
|---|---|---|---|
| 1:1 | 100% | $100,000 | No Leverage (Safest) |
| 1:30 (EU/UK Regulated) | 3.33% | $3,333 | Low Risk |
| 1:100 | 1.00% | $1,000 | Medium Risk |
| 1:500 (Offshore) | 0.20% | $200 | Extreme Risk |
| 1:1000 | 0.10% | $100 | Gambling |
Note: Higher leverage allows you to open larger positions with less money, but it forces your Margin Level (%) to drop much faster during drawdowns, leading to quicker stop-outs.
How to Avoid a Margin Call: Top Risk Rules
Risk 1% Per Trade
Never risk more than 1-2% of your total account equity on a single setup. This ensures a losing streak won't trigger a margin call.
Use Stop Losses
A hard stop loss guarantees your maximum drawdown is capped, protecting your Free Margin from sudden market spikes.
Beware Weekend Gaps
Holding highly leveraged positions over the weekend exposes you to massive price gaps when markets reopen on Monday.
Monitor Correlated Pairs
Buying EUR/USD and GBP/USD simultaneously effectively doubles your risk exposure and eats up margin twice as fast.
Margin Calculator FAQ
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Open ToolHigh Risk Investment Warning
Trading foreign exchange on margin carries a high level of risk and may not be suitable for all investors. The high degree of leverage can work against you as well as for you. Before deciding to trade foreign exchange, you should carefully consider your investment objectives, level of experience, and risk appetite. The possibility exists that you could sustain a loss of some or all of your initial investment.