💱 Forex Margin Calculator — Required Margin & Free Margin
Find the exact margin required to open any forex position. Enter lot size, leverage, and exchange rate to calculate required margin, position value, and margin level in seconds.
💱 Forex Margin Calculator
Switch between modes — calculate required margin for a trade, or find your maximum safe lot size
What Is Forex Margin and How Does It Work?
Forex margin is the minimum deposit your broker requires to open and hold a leveraged position. Think of it as a good-faith deposit — the broker locks it as collateral while your trade is open, then releases it back to your account when you close the position.
The required margin amount is always a fraction of the total position value, determined by the leverage ratio. With 50:1 leverage, you control a $100,000 position with just $2,000 in margin. The catch: losses are calculated on the full $100,000, not just your $2,000 deposit.
Required Margin = Position Value ÷ Leverage
Margin Rate % = (1 ÷ Leverage) × 100
Margin Level % = (Equity ÷ Used Margin) × 100
Position value = 200,000 × 1.0860 = $217,200 → Required margin = $217,200 ÷ 50 = $4,344
Required Margin by Leverage — 1 Standard Lot EUR/USD at 1.0850
| Leverage | Margin Rate | Required Margin | Risk Profile |
|---|---|---|---|
| 10:1 | 10.0% | $10,850 | Conservative |
| 20:1 | 5.0% | $5,425 | Moderate |
| 30:1 | 3.33% | $3,617 | Moderate (EU cap) |
| 50:1 | 2.0% | $2,170 | Elevated |
| 100:1 | 1.0% | $1,085 | High |
| 200:1 | 0.5% | $543 | Very High |
| 500:1 | 0.2% | $217 | Extreme |
Margin Level, Free Margin, and Margin Calls
Margin Level %
Margin Level = (Equity ÷ Used Margin) × 100. When this falls to 100%, your account equity equals the locked collateral — no room left for losses. Brokers typically issue a margin call warning here and force-close positions at the stop-out level, usually 50%.
Free Margin
Free Margin = Equity − Used Margin. This is the unallocated capital in your account. It can absorb floating losses or fund additional positions. If free margin hits zero, your broker can start closing your trades automatically.
Swap / Rollover Fees
Margin is not a cost — it is returned when you close the trade. The true carrying cost of holding a position overnight is the swap fee, which reflects the interest rate differential between the two currencies in the pair. Some pairs have positive swap rates (you receive a credit); most retail traders face a net debit.
Standard, Mini, Micro & Nano Lots
| Lot Type | Units | Pip Value (EUR/USD) | Typical Account Size |
|---|---|---|---|
| Standard | 100,000 | ~$10.00 | $10,000+ |
| Mini | 10,000 | ~$1.00 | $1,000–$10,000 |
| Micro | 1,000 | ~$0.10 | $100–$1,000 |
| Nano | 100 | ~$0.01 | Under $100 |
5 Rules for Safe Forex Margin Management
- Limit margin utilisation to 5% or less per trade. Professional fund managers typically use under 3%. Using 50%+ of your balance as margin on a single trade is a fast route to account liquidation.
- Leverage amplifies losses, not just profits. A 50-pip loss on a 1-lot standard EUR/USD position is approximately $500 regardless of whether you used 10:1 or 500:1 leverage. Leverage changes margin, not outcome size.
- Always maintain margin level above 200%. At 200%, you have a $2 equity buffer for every $1 of margin used. Below 150%, a single adverse session can trigger forced liquidation.
- Use the Max Lot Size mode before entering any trade. Know your position ceiling before you open the order screen, not after.
- Jurisdiction caps matter. EU and UK retail traders are capped at 30:1 on major pairs (3.33% margin rate). US traders are capped at 50:1. Higher ratios are available only to classified professional clients after meeting specific eligibility requirements.