Maintenance Margin Calculator
From position value, maintenance margin rate and current equity, get the maintenance margin, equity buffer and margin ratio.
Results
Fill in the inputs and click Calculate.
- Maintenance Margin
- –
- Equity Buffer
- –
- Margin Ratio
- –
Risk disclaimer
Estimates only. Real triggers also depend on fees, funding and mark price.
Why track maintenance margin?
Maintenance margin is the minimum equity to keep a position. Below it, the exchange reduces or liquidates — approaching it is your margin-call zone.
Margin ratio = equity ÷ maintenance × 100%; the closer it gets to 100%, the more dangerous.
How to use
- Enter current position (notional) value.
- Enter the maintenance margin rate (default 0.5%, tiered by size).
- Enter current position equity and click Calculate.
Formula
- Maintenance = position value × maintenance rate
- Buffer = equity − maintenance
- Margin ratio = equity ÷ maintenance × 100%
Example
Position 20,000, rate 0.5%, equity 200 → maintenance 100, buffer 100, ratio 200%.
If equity falls to 90 the ratio is 90% — below 100% means liquidation warning.
FAQ
Where is the maintenance rate from?
Venues use tiered rates by position size; enter your exchange's current rate here.