Margin Calculator [Free Tool]
Work out the exact collateral required to open a leveraged position, and how much adverse price movement it can absorb. See how leverage changes your buying power and your risk.
Disclaimer: Trading financial instruments involves risk, and everything on this page is provided for educational purposes only. Nothing here is financial advice or a recommendation to buy or sell any instrument.
Margin Required (USD)
$1100.00
Nominal value 110000 EUR ÷ 100
How is this calculated?
Nominal Value = Lot Size × Contract Size × Unit Value
Unit Value = Price (quote is USD) or 1 (base is USD)
Margin = Nominal Value ÷ Leverage
Read the full user guide
Every parameter, formula, and worked example — a complete reference for this tool.
What is trading margin?
Margin is the collateral a broker holds to secure a leveraged position — the capital you must lock up to control a position larger than your cash would normally allow. It is the price of leverage, and it governs two things at once: how much buying power you have, and how much adverse price movement you can absorb before a margin call. The calculator turns a position size and leverage level into the exact margin requirement.
Key concepts
Margin
The funds reserved as collateral for a leveraged position.
Leverage
The ratio of position size to margin — higher leverage means less margin but more risk.
Margin call
A demand to add funds when equity falls below the maintenance requirement.
A worked example with real numbers
- 1
Enter the position and leverage
You want a $20,000 position at 5x leverage.
- 2
Divide by the leverage
Required margin = $20,000 ÷ 5 = $4,000. That is the collateral locked up to control the position.
- 3
Read the buffer
Your $4,000 absorbs adverse movement until losses approach 100% of margin (minus maintenance requirements), at which point the broker acts.
- 4
Compare leverage choices
At 10x the same position needs only $2,000, but the distance to a margin call halves — leverage buys exposure with a shorter fuse.
How to use it
Enter position size and leverage
The exposure and its leverage.
Read required margin
The collateral needed to hold the position.
The formula, step by step
Margin
Margin = Position value ÷ Leverage
Forex contract sizes follow their own conventions.
Mistakes traders make
✗ Treating leverage as 'free buying power'
✓Leverage amplifies both gains and losses symmetrically. The reduced margin requirement is a shorter distance to forced action, not free money.
✗ Confusing margin with the total amount at risk
✓Margin is the collateral; the full position notional is what moves with price. The risk is the notional, not just the margin.
✗ Ignoring the difference between initial and maintenance margin
✓Initial opens the position; maintenance keeps it open. A margin call comes when equity falls below maintenance, well before margin hits zero.
When this tool fits — and when it does not
Use it when
- ✓Before opening a leveraged position, to know the exact collateral required.
- ✓Comparing how different leverage levels change the capital requirement.
- ✓Understanding how much adverse movement a position can absorb.
Skip it when
- ✗Choosing maximum leverage without a deliberate risk decision.
- ✗Assuming margin requirements are the same across brokers and instruments.
- ✗Trading on margin without knowing where the margin call sits.
Practical tips that actually help
Think in margin call distance, not just buying power
Before committing, compute how far price can move against you before a call. If that distance is small, the leverage is too high.
Keep a margin buffer in the account
Running at full margin leaves no room for volatility. A buffer turns a margin call into a warning instead of a forced exit.
Verify with your broker's schedule
Margin requirements vary by instrument and firm. Use the calculator as the estimate, then confirm the actual number.
Related & next steps
Frequently asked questions
Higher leverage — should I use it?▾
Leverage amplifies both gains and losses. It reduces required margin but shrinks the distance to a margin call or liquidation; it should reflect a deliberate risk decision.
What is the difference between margin and leverage?▾
They are inverse views of the same thing. Leverage is the position size divided by margin; margin is the position size divided by leverage. Flip one formula and you get the other.
What triggers a margin call?▾
When losses shrink your equity below the broker's maintenance margin requirement, the broker demands more funds or begins closing positions. It is the warning shot before forced liquidation.
How do forex margin conventions differ from stocks?▾
Forex margin is based on contract sizes and lot conventions, while stock margin is typically a fixed percentage of the position under regulatory rules. The calculator adapts the formula to the instrument.
Does margin amplify only losses, or gains too?▾
Both, symmetrically. A position on 10:1 leverage gains or loses ten times the percentage price move relative to the margin put up, which is precisely why it demands disciplined risk control.
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Margin requirements vary by broker and instrument; verify with your broker's schedule.
Disclaimer: The tools and content on this site are provided for educational purposes only and do not constitute investment advice. Trading and investing involve a substantial risk of loss, and past performance does not guarantee future results.