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Funding rate calculator

On perpetual futures you pay or receive funding every few hours. Enter your position size, the rate and how long you hold, and it totals what funding costs you (or pays you) over the whole period — the drag that quietly eats a held perp.

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Enter Position size, Funding rate per interval (%), Intervals per day, Days held and the Funding rate calculator works out Per interval, Per day, Total over period straight away. For instance, with Position size = $10,000.00, Funding rate per interval (%) = 0.01, Intervals per day = 3 and Days held = 30 it returns Per interval = $1.00, Per day = $3.00 and Total over period = $90.00.

How to use it

  1. Enter your values: Position size, Funding rate per interval (%), Intervals per day, Days held.
  2. Read the result instantly: Per interval, Per day, Total over period.

Frequently asked questions

What does the Funding rate calculator actually compute?

It takes Position size, Funding rate per interval (%), Intervals per day and Days held and derives Per interval, Per day and Total over period from them. The calculation is live as you type, so the result updates on every change.

What information do I need to provide?

4 values: Position size ($), Funding rate per interval (%), Intervals per day and Days held. Nothing else is required — no account, no file upload.

Can you show a worked example?

With Position size = $10,000.00, Funding rate per interval (%) = 0.01, Intervals per day = 3 and Days held = 30, the calculator returns Per interval = $1.00, Per day = $3.00 and Total over period = $90.00. Those figures come from running this exact tool, so you can reproduce them by entering the same values.

What happens if I enter larger values?

It moves a lot. Using Position size = $20,000.00, Funding rate per interval (%) = 0.011, Intervals per day = 6 and Days held = 60 instead, Per interval goes from $1.00 to $2.20 — which is why it is worth testing a few scenarios rather than trusting a single figure.

What does it give for smaller values?

Scaled down to Position size = $5,000.00, Funding rate per interval (%) = 0.009, Intervals per day = 2 and Days held = 15, Per interval comes out at $0.45. The relationship is worth checking at both ends before you rely on a single result.

When would I actually use this?

Comparing two investments that pay at different times, deciding whether a project clears its cost of capital, and sanity-checking a valuation someone else produced.

What is the most common mistake?

Trusting a valuation without asking what share of it comes from the terminal value. Past 70%, the answer is an assumption about the distant future dressed up as a calculation.

What is the difference between the Funding rate calculator and the Forward Rate Calculator?

This one returns Per interval and Per day; the Forward Rate Calculator returns Result. That is the whole difference — open the one whose figure you need.

Is there a tool for the next step?

Real Rate of Return Calculator is the closest one after this: Strip inflation out of a nominal return with the exact Fisher equation, and see how far the simple subtraction is off.

What else is worth having open alongside it?

Fund expense ratio cost calculator and Yield farming APY calculator — they come up in the same task often enough to be worth a second tab.

Further reading

All guides →
ExplainerWhat Is a Funding Rate? The Recurring Cost of Holding a PerpetualFunding is paid every eight hours on the full notional, between traders rather than to the exchange. A rate of 0.01 percent looks like nothing and costs 10.95 percent a year. Here is the formula and an annualised table.ExplainerHow Staking Rewards Actually Work: Nominal Rate, Compounding, and What Eats ItAn advertised 8 percent becomes 8.33 percent once daily rewards compound — and then 7.46 percent after a 10 percent validator commission, and less again after unbonding time. Here is each step, with the arithmetic laid out.ComparisonRegulated Savings, a Euro Fund or a Fixed-Term Deposit: the Ranking Inverts TwiceThe product paying the second-highest headline rate finishes last, and the reason is a tax change that took effect in January 2026. The three French savings vehicles scored on identical criteria: rate, tax, net return, real return, and what each one costs you in access.GuideBuying Back Retirement Quarters or Points: From What Age It Stops PayingThe usual advice is that a buy-back gets worse with age, because the price rises. The French scale is written to be actuarially neutral, so that is not quite what is happening — and once you see what actually moves the answer, the decision changes. Computed on the current parameters.ExplainerPresent Value vs Future Value: Why Money in Thirty Years Is Worth About an Eighth of Its FacePV = FV ÷ (1+r)^n. At 7 percent over 30 years the discount factor is 0.131, so a promise of $100,000 in thirty years is worth $13,137 today — and $41,199 if you assume 3 percent instead.ExplainerHow Wrong Is Nominal Minus Inflation? Exactly One Year's Inflation WrongThe subtraction is not an approximation of the Fisher relation — it is the exact answer multiplied by (1 + i). At 8 percent nominal and 3 percent inflation the real return is 4.8544 percent, the shortcut says 5, and the error is exactly 3 percent of the answer. Always.