Funding budget runway calculator
How long can I hold a perpetual futures position at this funding quote? Convert a self-chosen funding spending limit into full payments and approximate equivalent days.
Funding spending limit
Current quoteBTC · Binance · long. Current exchange funding quote from the snapshot time above. Interval: 8h (market-reported).
Payment #11 exceeds the budget: cumulative spending would be $11.00000000. Positive amounts are paid; negative amounts are received.
Formula and example
Payment cost = USD notional × signed 8h rate × interval hours / 8 (reverse the sign for shorts). Daily cost = payment cost × 24 / interval hours. Full payments = floor(budget / positive payment cost). Equivalent days ≈ budget / positive daily cost.
Hypothetical example, not a current quote: $10,000 long at +0.01% / 8h with a $10 budget pays $1 per 8h payment and $3 per day: 10 full payments, then payment #11 exceeds the budget; approximately 3.3333 equivalent days. At a 1h interval it pays $0.125 per payment: 80 full payments, with the same daily cost. A short receives at this positive quote.
The budget is your self-chosen spending limit, not available margin. Rates and notional can change. Payment counts are not exact holding, liquidation or expiry times. Equivalent days ignore where you are within a funding interval. This calculation does not predict funding debits, liquidation or real maintenance requirements.
Integer boundaries use decimal input and quote representations, rounded down without an extra-payment tolerance.