Funding Rate Calculator

Funding is a cost of carry, not free money. See what holding a perp position costs per interval, per day, and annualised.

Position notional (USDT)

Margin posted (USDT)

Funding rate % per interval

Intervals per day

Days held

Cost per interval—

Per day—

Over holding period—

Annualised on margin—

Runs entirely in your browser. Nothing is sent anywhere, nothing is stored.

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The next number

One figure rarely settles a position. These are the others.

Futures Fee Calculatorwhat the round trip costs before the market moves Liquidation Price Calculatorwhere the position stops existing Position Size Calculatorhow large the position should have been

See what carry actually cost, day by day →

What funding is

Perpetual futures never expire, so exchanges use a funding payment to tether the perp price to spot. Longs pay shorts when funding is positive, shorts pay longs when it is negative, and it settles every eight hours on most venues.

Reading the number

Sign tells you which side is crowded. Deeply negative funding means shorts are paying to stay short. That is a crowded-short reading, not a sell signal.
Magnitude is cost of carry. A 0.1% funding print is 0.3% a day. On a 10x position that is 3% of your margin every day, before trading fees. Most "the trade went sideways and I still lost" stories are exactly this.
Funding is not free money. The spot-long / perp-short basis trade collects funding but pays fees on both legs and carries liquidation risk on the perp leg.