Hunter KillerCreate free accountFunding Rate Calculator
Work out what perpetual-futures funding actually costs (or earns) over the life of a position, before the position teaches you.
Your funding scenario
Funding is a per-interval payment on the full notional. Enter the position, a rate, and how long you plan to hold; the calculator projects the total at that rate.
A positive rate means longs pay shorts; a negative rate means shorts pay longs. This projection holds ONE rate constant, and real funding never sits still: every venue re-publishes its own rate each interval, intervals differ per venue, and the rate flips sign exactly when positioning gets crowded. Treat the output as a scenario, not a forecast. Funding is charged on notional, not margin, so on a leveraged position the carry is proportionally larger against what you posted. Crowded, one-sided positioning is also where liquidation cascades begin: see it on the Money Map, 2 hours behind.
Extreme funding shows one-sided positioning
Sustained funding extremes show one-sided positioning. Compare the published record, including reached and missed levels, with its sample sizes and confidence bounds.
Term: Funding rate · Negative funding · Perpetual swap · Basis
Questions traders actually ask
What is the funding rate?
Perpetual futures have no expiry, so exchanges pin them to spot with a periodic payment between longs and shorts. When the rate is positive, longs pay shorts; when negative, shorts pay longs. It is charged on the full notional of the position, not on the margin you posted.
How often is funding charged?
Most major venues settle every 8 hours (3 times a day), some every 4 or 1 hour, and each venue publishes its own interval and its own rate per contract. The rate also moves from interval to interval and flips sign with sentiment, which is why a constant rate here is a scenario, not a forecast.
Does funding really matter?
Per interval it looks trivial, but it compounds and it is levied on notional. A steady 0.01% every 8 hours is about 10.95% of notional per year; a crowded trade printing 0.1% intervals costs about 109.5% of notional annualized. On a 10x position that comes out of a margin post one tenth the size.
Is this free?
Yes, no account, nothing stored. Everything runs in your browser.
Keep going with the other free tools
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- Crypto P&L calculator: net P&L, ROE and breakeven after fees and funding
- What is liquidation in crypto? The plain-English explainer with a worked example
- Liquidation heatmap explained: how to read the clusters and spot a cascade path
- Coinglass alternative: compare research tools and inspect the public record, misses included
- Liquidation map for TradingView users: measured levels beside your TV charts
- Hyblock alternative: the honest side-by-side with the orderflow analytics suite
- Money Map: estimated liquidation concentrations in dollars, 2 hours behind
Guides from the library
Educational tools, not financial advice. Trading perpetual futures carries a real risk of total loss.
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