Position size calculator
Find the position size that loses a fixed part of your account at the stop-loss price. The loss includes the taker fee on entry and exit.
$4,764.98
Position size · 0.0563136 units at $84,615
1x
Leverage needed · position size ÷ account size
−$100.00
Loss at the stop · $4.72 of it is fees
Your trade
Values stay in your browserMargin and target
Isolated margin- Margin required
- $476.50
- Liquidation price
- $76,536
- Profit at target
- $185.76
- Reward to risk
- 1.86 : 1
The stop distance is 2.00% of the entry price. Slippage at the stop and funding are not included. Check the liquidation price with the liquidation price calculator.
Worked example at the live BTC price
The entry is the Binance BTC mark price of $84,615 at October 3, 2026, 11:37 UTC. The stop is $82,923, 2% lower. A $10,000 account with 1% risk can lose $100 at the stop. At the Binance base taker fee of 5.00 bps on entry and exit, the position is $4,764.98. Of the $100 loss, $4.72 is fees and $95.28 is the price move. The position needs at least 1x leverage.
Position size formula
Start from the amount you accept to lose: the account size times the risk percent. At the stop, you lose the price move and pay a fee on entry and on exit.
Position size = risk amount ÷ (stop distance + fee rate × (1 + stop price ÷ entry price))
Leverage needed = position size ÷ account size (1x or more)
The stop distance is the gap between entry and stop, divided by the entry price. The fee list shows the base-tier taker fee of each venue from the PerpFinder fee registry. Use the perp fee calculator to find the tier for your volume.
A stop order can fill at a worse price in a fast market. Slippage and funding are not part of this result. The leverage setting changes the margin and the liquidation price, not the loss at the stop. Keep the liquidation price beyond the stop. The calculator shows a warning when it is not.
Questions answered from the data
How big should my position be with a 2% stop?
With a $10,000 account, 1% risk and a stop 2% below the entry, the position is $4,764.98 at the Binance base taker fee of 5.00 bps.
Without fees, it is $5,000.89.
What leverage do I need for this position?
A $4,764.98 position on a $10,000 account needs at least 1x.
Higher leverage lowers the margin but not the loss at the stop. It moves the liquidation price closer to the entry.
How much do fees change the position size?
The base taker fees in the PerpFinder registry go from 2.00 to 8.00 bps.
For the same 1% risk and 2% stop, the position goes from $4,633.82 at the highest fee to $4,903.77 at the lowest fee.