The funding rate calculator tells crypto futures traders exactly how much they pay or receive in funding fees for holding a perpetual futures position. Funding fees are charged every 8 hours on most exchanges (Binance, Bybit, MEXC, OKX) and can significantly erode profits on long-held positions. When the funding rate is positive, longs pay shorts; when negative, shorts pay longs. Enter your position size in USD, the current funding rate percentage, and how many 8-hour periods you plan to hold to instantly see your total funding cost or income.
This free funding rate calculator works directly in your browser — no download, no registration, and no delay. All calculations are performed client-side, so your trading data is never transmitted to a server.
The formula used is: Funding Fee = Position Size × Funding Rate % | Per 8h period | Daily = Fee × 3. This is the same formula used by professional traders and institutional risk managers worldwide.
Supported asset classes include: Crypto, Futures. Each asset class applies the correct unit conventions so results are always accurate regardless of the market you are trading.