Forex Margin Calculator
The forex margin calculator estimates the collateral for one entered position from lots or quantity, editable broker contract size, leverage, account conversion and an optional margin multiplier. It also shows position notional, effective margin percentage and an equity comparison. It does not reproduce broker free margin, floating tiers, hedged margin, fixed initial margin or pre-trade approval.
Position inputs
Describe one position under a simplified contract-leverage calculation.
Supplies the margin currency and an editable starting contract quantity.
The currency used for the primary required-margin result.
Fractional lot counts are accepted.
Multiplier applied to the standard contract entered below.
Starts with this site's instrument metadata. Replace it with the contract size shown in your broker's symbol specification.
Enter the position quantity directly instead of converting it from lots.
Enter 100 for 1:100. Use the effective leverage shown for this symbol by your broker.
Leave at 1 unless the broker specification shows an applicable long or short margin rate, such as 1.15.
The required rate direction appears here.
Compares this isolated estimate with entered equity. It does not calculate broker free margin or a margin-call threshold.
Required margin estimate
Derived from the entries above using Required Margin Estimate model 1.1.0.
Position-scale comparison
Same leverage, conversion and multiplier; only position quantity changes.| Scenario | Position quantity | Required margin |
|---|---|---|
| Half entered position | — | — |
| Entered position | — | — |
| Double entered position | — | — |
How to use the forex margin calculator
- Select the instrument and account currency. The calculator uses them to label the margin currency and required conversion direction.
- Enter lots or direct quantity. In lots mode, confirm the standard contract quantity against the exact broker symbol specification before accepting the site default.
- Enter effective leverage and conversion. Use the leverage that applies to this symbol and volume. Leave the broker margin multiplier at 1.00 unless the applicable specification provides another rate.
- Read the calculation stages separately. Compare raw margin, account conversion, multiplier effect, final required margin and the neutral half/double position rows.
Confirm the final figure with the broker platform's own pre-trade margin estimate. This browser calculation does not know the account's existing exposure, floating tier, hedging method or fixed initial-margin settings.
Required-margin methodology and formula
The calculator converts lots to the entered standard contract quantity. Under the simplified forex or contracts-leverage method, it divides quantity by the leverage denominator, converts the raw margin to account currency, then applies the entered broker margin multiplier once.
Raw margin in margin currency = Position quantity / Leverage denominator
Pre-multiplier account margin = Raw margin x Base-to-account rate
Required margin estimate = Pre-multiplier account margin x Entered margin multiplier
Effective margin percentage = Required margin estimate / Position notional in account currency x 100
MetaTrader 5 Help — Margin Calculation documents the forex formula as volume in lots × contract size ÷ leverage, followed by deposit-currency conversion and any applicable margin rate. It also shows why symbol calculation mode and broker settings must be checked.
Worked example: EUR/USD required margin
How to interpret the result
Either result is an isolated simplified collateral estimate, not broker free margin, maximum loss or confirmation that an order will pass pre-trade checks. Use 1.00 unless the applicable broker symbol specification provides a margin multiplier for the position side; floating tiers, fixed initial margin, hedged positions and open exposure remain outside this model.
Conversion and quantity examples
Scroll horizontally to compare each quantity and conversion example.| Example | Margin before conversion | Manual conversion | Account estimate |
|---|---|---|---|
| EUR/USD, 100,000 units, 1:100, USD account | 1,000 EUR | 1 EUR = 1.085 USD | 1,085 USD |
| USD/JPY, 100,000 units, 1:100, USD account | 1,000 USD | Direct | 1,000 USD |
| XAU/USD, 100 ounces, 1:100, USD account | 1 XAU | 1 XAU = 2,300 USD | 2,300 USD |
The gold row demonstrates this model's arithmetic, not a universal broker requirement. A broker can apply a different contract size, fixed initial margin, symbol margin rate or calculation mode.
Assumptions and limits
- The model estimates one isolated position and does not inspect existing positions, pending orders or current used margin.
- Rates are manually entered and have no automatic timestamp or broker attribution.
- The optional multiplier is applied once after account conversion. It does not model floating volume/notional tiers or automatically select a long/short rate.
- Broker rules may instead use fixed initial margin, symbol-specific calculation modes, tiered leverage or hedged-position treatment.
- The optional equity comparison subtracts only this estimate. It is not broker free margin and does not predict a margin call or stop out.
- The output is not a position-size recommendation, trade signal or statement that an account can support the position.
Sources and methodology
- MetaTrader 5 Help — forex margin calculation documents the leverage formula, deposit-currency conversion, margin-rate multiplier and alternative symbol modes.
- MQL5 Reference — OrderCalcMargin documents broker-platform pre-trade margin estimation, which this isolated browser model does not reproduce.
- MQL5 Reference — symbol properties documents contract and margin fields that can differ by instrument.
Frequently asked questions
- The simplified model divides position quantity by the leverage denominator, converts that raw margin into account currency and applies the entered broker margin multiplier once. The default multiplier is 1.00.
- Use the contract quantity shown for the exact symbol in your broker platform. The site supplies an editable starting value, not a universal promise: FX commonly starts at 100,000 base units, XAU/USD at 100 ounces and XAG/USD at 5,000 ounces.
- It is an optional factor applied after account-currency conversion. Leave it at 1.00 unless the applicable symbol specification provides a long or short margin rate. This input does not reproduce floating tiers.
- The formula first produces an amount in the instrument's base currency. If that differs from the account currency, the calculator needs account-currency units per one base-currency unit.
- No conversion is needed. For USD/JPY in a USD account, 100,000 units at 1:100 produces a simplified estimate of USD 1,000.
- No. Free margin depends on broker-account equity and all used margin. The optional comparison on this page only subtracts this isolated estimate from the equity you enter.
- Yes. Contract size, calculation mode, effective leverage, fixed initial margin, margin rates, tiers and hedging treatment can differ by broker, entity, account and symbol.
- No. For a fixed position quantity and price move, changing leverage changes this margin estimate but not the gross monetary profit or loss generated by that move.
Continue your trade workflow
Verify broker margin terms
Before placing an order, check the calculation mode, contract quantity, effective leverage and margin rates for the broker entity and symbol available in your jurisdiction.
XM
Verify the symbol specification, calculation mode and account conditions that apply to you.
Check XM termsFXOpen
Confirm the symbol margin method and account-currency treatment before trading.
Check FXOpen termsRisk and affiliate disclosure: Leveraged forex and CFD trading can result in substantial losses. These are affiliate links, so ForexMT4Indicators.com may receive compensation if you register or trade through them, at no additional cost to you. Availability and terms vary by jurisdiction and broker entity.