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Position Size Calculator

Work out the exact position size for a crypto trade from your balance, risk % and stop-loss, so every trade risks the same controlled amount.

Risk amount10 USDT
Position size0 units
Position value0 USDT
Margin required (1x)0 USDT

How to use the position size calculator

Position sizing starts from the loss you accept, not from the leverage you pick. Decide what share of your balance one losing trade may cost, then let the distance to your stop-loss decide how big the position can be.

Enter your balance, the risk per trade in percent, your entry and your stop-loss. The calculator returns the number of coins to buy or sell so that hitting the stop loses exactly your chosen amount, plus the position value and the margin it needs at your leverage.

Leverage only changes the margin you post. It does not change the size or the loss at your stop: the same position at 2x or at 20x loses the same amount when the stop is hit, while higher leverage moves the liquidation price closer.

The formula

  • Risk amount = balance × risk % ÷ 100
  • Position size (coins) = risk amount ÷ |entry − stop-loss|
  • Position value = position size × entry
  • Margin required = position value ÷ leverage

Worked example

Balance 1,000 USDT, risk 1%, entry 65,000, stop-loss 64,000, leverage 5x.

  1. Risk amount = 1,000 × 1% = 10 USDT.
  2. Distance to the stop = 65,000 − 64,000 = 1,000 per coin.
  3. Position size = 10 ÷ 1,000 = 0.01 BTC.
  4. Position value = 0.01 × 65,000 = 650 USDT, so the margin at 5x is 130 USDT.
  5. If the stop is hit, the loss is 0.01 × 1,000 = 10 USDT, the 1% you chose, before fees.

Frequently asked questions

What percentage should I risk per trade?

Many traders keep it between 0.5% and 2% of the account. At 1%, ten losses in a row cost about 10% of the balance, which is survivable; at 10% the same streak empties most of the account.

Does higher leverage mean a bigger loss at my stop?

No. With the position size fixed by your risk, leverage only changes the margin posted. The loss at the stop is the same; what changes is how close the liquidation price sits, so keep the stop well before it.

Are fees included?

No. Taker fees on entry and exit and any slippage add to the loss at the stop. On a tight stop they can be a meaningful share of the risk, so leave room for them or use the Profit & Loss calculator to price them.

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Estimates for education only — not financial advice. Exchange fees, slippage and funding are not included unless stated.