Funding Cost Estimator

A perpetual never expires, but funding is settled every 8 hours. Hold a position long enough and that charge quietly stacks up. Enter your position value, the funding rate, and how long you plan to hold, and this does the arithmetic at a fixed rate so you can see what funding alone eats. It's not a profit forecast — the real rate changes every period.

How it works: Binance USDT perpetuals usually settle funding every 8 hours (some contracts settle on a different interval — check the Binance page). Number of settlements = hours held ÷ 8, rounded down; each charge = position value × the period's rate. The funding rate floats in real time and can be positive or negative: when it's positive, longs pay shorts; when it's negative, shorts pay longs — so on the right side it can even be income. This tool estimates at the fixed rate you enter; in reality every period's rate can differ. It runs entirely in your browser — nothing is sent, uploaded, or saved.

How the tool does the math

The logic is plain. Every settlement period (8 hours by default), your position value is multiplied by that period's funding rate, and you either pay or receive that amount. Divide hours held by 8 and round down to get how many settlements the window covers; each charge is "position value × rate%"; add them up for the total funding. Divide back by position value and you see what that cost is as a share of the position.

Say your position is 10,000 USDT, the rate is 0.01%, and you hold a full 24 hours: that's 3 settlements, 1 USDT each, 3 USDT in total, or 0.03% of position value. Looks small, but when the rate runs hot (in an overheated market a single period can reach a few tenths of a percent), a few days adds up fast.

What it can't tell you: the real rate for each period ahead. Funding is set by market positioning and recomputed every period — it can come in higher or lower than what you entered, and even flip from positive to negative. It also doesn't touch your position's own profit and loss, liquidation price, fees, or slippage — those are separate. It answers one question: at this rate, held this long, roughly how much is funding alone.

How to use the number to decide

If you plan to hold one direction for a long time, estimate the cost off the last few periods' real rates before you choose perpetual versus spot. Spot has no funding, so it's easier on a long hold; perpetuals suit leverage and shorter-to-medium trades. To weigh spot against futures grids, see spot grid vs futures grid. Enter the rate Binance is actually showing for the current period — don't guess a round number.

This isn't investment advice. Reference: Binance Help Center (funding rate and settlement). Rates and settlement intervals follow whatever Binance's official page shows for the current period.

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