Position Size Calculator Crypto: Size Futures by Risk

Crypto Position Size Calculator

Size a crypto futures trade from how much you are willing to lose. Enter your account balance, the risk per trade, the entry and the stop-loss: the calculator returns the position size, the margin it needs at your leverage and a warning if the liquidation price comes before the stop.

Risking 1.00% of a $10,000.00 account on a BTC long from $84,714.30 with a stop at $83,020.00 means a position of 0.0562377 BTC ($4,764.14).

BTC price: Binance perp, liveMaintenance margin: Bybit's first risk tier for BTCUSDT (0.33%)As of 18:48 UTC

Your position

USDT perps, isolated margin

Result

Link to this calculation

Position size: 0.0562377
Position value: $4,764.14
Margin needed: $952.83
Loss if stopped out: $100.00
Stop distance: -2.00%
Estimated liquidation price: $68,029.95

Estimate: These are estimates. Exchanges use tiered maintenance margin (bigger positions need more), liquidate on the mark price rather than the last trade, and handle fees and cross margin their own way. Check your exchange's position screen before you trade.

Worked example

BTC long, the numbers above

Risking 1.00% of $10,000.00 means you accept losing $100.00 if the stop is hit.
Each BTC loses $1,694.30 between entry $84,714.30 and stop $83,020.00, plus 0.05% fees on the way in and out.
Position size = $100.00 ÷ loss per coin = 0.0562377 BTC, worth $4,764.14.
At 5x that needs $952.83 of margin. Leverage changes the margin, not the risk: the stop sets how much you lose.

The formula

Amount at risk = Balance × Risk % · Loss per coin = |Entry − Stop| + fee × (Entry + Stop)

Position size = Amount at risk ÷ Loss per coin · Margin = Position size × Entry ÷ Leverage

The stop-loss decides how much you lose, not the leverage. Leverage only sets how much margin the position ties up. The liquidation price uses the isolated-margin formula from the liquidation price calculator; if it sits between your entry and your stop, the stop never gets a chance to fire.

Crypto Position Size Calculator FAQ

How do I calculate position size from risk?

Position size = amount at risk ÷ loss per coin at the stop. With a $10,000 account and 1% risk you can lose $100; if the stop is $2,000 below entry, that is 0.05 BTC, fees aside.

Does leverage change my risk?

No. The stop-loss sets the loss. Leverage only changes how much margin the position ties up, and more leverage moves the liquidation price closer to your entry.

Why the liquidation warning?

If the liquidation price is between your entry and your stop, the exchange closes the position before your stop is hit and you lose the whole margin. Lower the leverage until the liquidation price is beyond the stop.

Are fees included?

Yes: the fee rate is charged on the entry and the stop value, so the size is a little smaller than without fees. Use your exchange's taker fee if your stop is a market order.