How it works
Perpetual funding is modeled as a transfer based on notional exposure and a funding rate for each interval. The calculator does not impose an exchange schedule.
The formula
Keep currency, units and time periods consistent. Percentage inputs use percentage points (enter 5 for 5%). Results are rounded only for display; tiny nonzero values may use scientific notation. Undefined ratios are shown as unavailable.
Position notional: $10,000; Funding rate / interval: 0.01%; Intervals: 8; Funding / interval: $1.00; Total absolute funding: $8.00; Example convention: If longs pay positive funding: long pays $8; short receives $8.
Calculation method
Select which side pays when funding is positive. Negative rates reverse that direction. Positive results mean funding paid; negative results mean funding received for the selected position.
Interpretation
A constant-rate scenario repeats the same rate and exposure. In interval-list mode, each line can include a rate and an optional replacement notional, allowing exposure changes to be represented.
Limitations
Funding can change sign or size at each interval. The rate list uses supplied values and the constant scenario is hypothetical. Funding as a share of margin is unavailable at zero margin and does not model liquidation.
Method and reference sources
Method and content checked 2026-09-20. These sources provide background, not endorsement or professional certification. The formula and limitations above define this calculator.
- CME Group — Calculating futures profit or lossContract size and price-movement context; verify your broker or exchange specification separately.
- Investor.gov — Understanding FeesInvestment fee and compounding context; enter the terms of your fund or account.
Frequently asked questions
Is a positive funding rate always a cost?
The payment direction also depends on whether the position is long or short and the platform convention. Confirm the convention and interval; the rate is not automatically annualized.
What is a worked example for Funding Rate?
Position notional: $10,000; Funding rate / interval: 0.01%; Intervals: 8; Funding / interval: $1.00; Total absolute funding: $8.00; Example convention: If longs pay positive funding: long pays $8; short receives $8.