Crypto Derivatives Tools

Perpetual Funding Rate Calculator

Know what funding costs before you open the position.

Perpetual futures charge or pay funding every 8 hours. This calculator shows the daily cost, total cost over your hold period, and the annualized rate, so you can factor ongoing funding into expected P&L before entering a position.

Open calculator How funding rates work

By Swoopr Editorial Team

Published · Updated

AI-assisted content · Swoopr Investment is responsible for the final published article.

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Direct Answer

Perpetual futures funding is a periodic payment, typically every 8 hours, exchanged between long and short position holders to keep the perpetual contract's price anchored to spot. This calculator converts a funding rate into its daily cost, total cost over a chosen hold period, and annualized rate, so ongoing funding can be factored into expected profit and loss before entering a position.

Funding Cost Calculator

Total notional value of your perp position, not margin posted.
Current rate shown on your exchange (e.g., 0.01 for 0.01%). Positive = longs pay shorts.
How many days you plan to hold the position.
Longs pay shorts when funding is positive; shorts pay longs when funding is negative.

Results

Funding per 8-hour period
Daily funding cost (3 periods)
Total over hold period
Annualized funding rate
Breakeven price move needed

Results assume constant funding rate throughout the hold period. Actual rates change every 8 hours. Factor a 2-3x sensitivity check into your planning.

How to Use This Calculator

  1. Position size: Enter the total notional value (quantity × price), not the margin you posted. If you hold 1 BTC perp at $65,000, enter $65,000.
  2. Funding rate: Find the current funding rate on your exchange's derivatives page (e.g., Binance Futures, Bybit, OKX). It is typically displayed as a percentage per 8-hour funding interval.
  3. Hold period: Enter the number of days you intend to hold the position. For swing trades, 3-14 days is common; for longer directional holds, up to 30-90 days.
  4. Side: Select Long or Short. When funding is positive, longs pay shorts, the calculator applies the correct sign automatically.
  5. Interpret results: Compare "Total over hold period" to your expected profit from price movement. If funding represents more than 20-30% of expected profit, the trade may not have sufficient expected value to justify the position.

For background on what funding rates are and how they are calculated, see the Perpetual Futures and the Funding Rate Mechanism guide.

References

Disclaimer

This calculator is for educational and informational purposes only. It does not constitute financial or trading advice. Results assume constant funding rate throughout the hold period; actual rates change every 8 hours and can vary substantially. Always verify the current funding rate on your exchange before trading.