Funding Fee Calculator
Free funding fee calculator for crypto perpetual futures. Enter your position size, funding rate and holding time to estimate how much funding you'd pay or receive. Manual entry only — nothing is connected to any exchange.
Estimate your funding
Estimate what a perpetual futures position would pay or receive in funding. You type the numbers in — nothing is connected to any exchange.
Enter your position details and tap Calculate to see your estimated funding.
How funding fees work
Perpetual futures don't expire, so exchanges use a periodic funding payment to keep the contract price close to the spot price. At each interval, one side pays the other. When the funding rate is positive, longs pay shorts; when it's negative, shorts pay longs. You're never charged by us — this tool just does the arithmetic on numbers you enter.
The formula
Notional is your position value in USD. The sign depends on your side and whether the rate is positive or negative.
Long vs short
Pick your side. A long pays when the rate is positive and receives when it's negative; a short is the opposite.
Any interval
Most exchanges settle funding every 8 hours, but some use 4-hour or 1-hour intervals. Choose what matches your platform.
Pay or receive
See at a glance whether you'd pay or receive funding over your holding period, and the per-interval amount.
Annualized view
We show the annualized (APR) equivalent so you can compare funding across different rates and intervals.
Why track funding
Funding is easy to overlook, but over many intervals it adds up and quietly changes your real result. Knowing the number ahead of time helps you stay in control.
Know the cost upfront
Estimate funding before you hold, so it's never a surprise on your statement.
Compare scenarios
Test different sizes, rates and intervals to understand what drives the number.
Stay accountable
Awareness is the first step to responsible trading. Track your numbers and make informed decisions.
Frequently asked questions
What is a funding fee?
A funding fee is a periodic payment exchanged between traders holding long and short perpetual futures positions. It keeps the perpetual price aligned with the underlying spot price. It is not a fee charged by this tool.
Who pays the funding fee?
It depends on the funding rate. When the rate is positive, long positions pay short positions. When the rate is negative, short positions pay long positions.
How is the funding fee calculated?
For each interval, funding equals your position’s notional value multiplied by the funding rate. Multiply by the number of intervals you hold to get the total. This calculator does that math for you.
What funding interval should I choose?
Use the interval your exchange settles on. Many platforms use 8 hours by default, but some use 4-hour or 1-hour intervals. Choose the one that matches where you trade.
Does this connect to my exchange account?
No. This is a manual calculator. You type in your own numbers and nothing is connected to, imported from, or synced with any exchange or account.
Is the estimate exact?
It's an estimate. Real funding depends on the actual rate at each settlement, which changes over time. The calculator assumes the rate you enter stays constant for the whole period.
Important disclaimer
This calculator is for educational and informational purposes only. It performs arithmetic on numbers you enter manually and does not connect to any exchange or account. Funding rates change continuously, so actual results will differ. Trading perpetual futures involves significant risk and you may lose money. Always do your own research and consider consulting a qualified professional.
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