Funding Fee Calculator
Work out exactly what you'll pay — or receive — in funding on a perpetual futures position. Free, instant, runs in your browser.
How funding fees work
Perpetual futures have no expiry, so exchanges use a funding rate to keep the contract price tethered to spot. Every funding interval — usually every 8 hours — longs and shorts exchange a payment based on the rate:
Funding = Notional × Funding rate, each interval.
When the rate is positive, longs pay shorts (the market is long-heavy). When it's negative, shorts pay longs. A negative output above means you receive funding.
Worked example
A $10,000 long held across three 8-hour intervals at a 0.01% rate:
Small per interval, but it compounds on big or long-held positions. Read what is a funding rate for the full picture.
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Educational tool, not financial advice. Real funding depends on your exchange's rate and timing.