TradingCalcAster Funding Rate Calculator
PERPETUAL FUTURES · HISTORICAL COST · PER 8H PERIOD
Calculate the true funding rate cost of holding a Aster perpetual futures position. See cost per 8h, daily and weekly using historical rates.
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Funding rates on Aster
Aster settles funding every 8 hours: at 00:00, 08:00 and 16:00 UTC. The rate is calculated based on the difference between the mark price and index price, with a 0.01% interest rate component. If you hold a position through a funding timestamp, you pay or receive based on your side.
This calculator fetches actual historical Aster funding rates for the selected instrument and sums the exact cost for your holding period, not an estimate. Enter the date you opened your position and the calculator accounts for every funding interval from then to now.
Aster fee structure
Aster charges maker fee 0.02% and taker fee 0.05% on perpetual futures. Maximum available leverage is 100×. This calculator pre-fills these defaults so you get accurate results without needing to look up the fee schedule. If you are on a VIP tier with discounted fees, adjust the fee fields accordingly.
Maker orders (limit orders that add liquidity) cost less than taker orders (market orders that remove liquidity). On Aster, using limit orders for both entry and exit can reduce your total fee cost significantly compared to market orders.
Related Aster calculators
Compare Funding Rate across exchanges
Fees and leverage differ by exchange: see the same funding rate math with another exchange's defaults, or switch freely on the generic version.
Use via API or MCP
This Aster funding rate math is also a deterministic API call: plug exact figures into trading bots, dashboards, or AI agents instead of estimating.
View API & MCP docs →What is a funding rate?
Funding rates are periodic payments between long and short traders to keep perpetual futures prices anchored to the spot market. Paid every 8 hours on most exchanges.
When does funding cost become significant?
Funding accumulates over time. A 0.01% rate per 8h equals 0.03% per day and ~0.9% per month. On a large leveraged position this adds up quickly.
What assumptions and edge cases does this calculator use?
Size, entry price and days must be above zero. The funding rate is a fraction per interval (0.0001 is 0.01 percent) and can be negative, and the interval is 0.25 to 24 hours (default 8). If funding costs more than the whole position is worth you get an error. Not covered: a funding rate that changes during the hold, and price moves.
What are Aster perpetual futures fees?
Aster charges maker fee 0.02% and taker fee 0.05%. Maximum leverage is 100×. This calculator uses these defaults but you can adjust them for your actual rate tier.
Is this calculator specific to Aster?
Yes, the exchange is pre-selected to Aster with live prices pulled from their API. You can switch to any other supported exchange using the instrument selector.