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Futures position size & liquidation calculator

Size the trade from your invalidation, not your hopes. Enter your account, risk, entry and stop — this gives you position size, the highest safe leverage rung, an estimated liquidation price, and whether TP1 clears the fee cost floor Ninja Trades uses to reject trades.

Set the stop where your idea is wrong — never where the numbers look nicer. Everything else is derived from it.

Tradeable sizeCost floor 0.42%R:R ≥ 1.5
Risk amount10 USDT1% of account
Stop distance9001.50%
Position size666.67 USDT
Position size (base)0.011111units
Derived leverage20×highest safe rung
Margin required33.33 USDT
Est. liquidation57,3003.0× stop away
R:R to TP12.00TP1 3.00% away
  • • Cost floor and R:R gates pass, and liquidation sits clear of the stop.
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How the math works

  1. 1. Risk first. Your loss is capped at account size × risk %. That number never changes, no matter what leverage you pick.
  2. 2. Stop distance sets the size. Position size = risk ÷ |entry − stop|. A wider stop means a smaller position, not a smaller stop.
  3. 3. Leverage is derived. We take the highest rung (1–20×) whose estimated liquidation still sits 1.5 stop-distances beyond your stop. Leverage only decides margin — and how much room you have before the exchange closes you.
  4. 4. Gates last. TP1 must be at least 0.42% from entry (taker round-trip ≈ 0.14% × 3) and R:R must clear 1.5. Fail either and the honest answer is no trade.

Why traders blow accounts here

  • Sizing to leverage, not to risk. "20× on $1,000" is not a plan — it's a position with no defined loss.
  • Tightening the stop to fit the size. That moves the stop into noise and converts a good idea into a stop-out.
  • Ignoring fees on scalps. A 0.3% target on a taker round trip gives back half the move before slippage.
  • Sitting close to liquidation. If liquidation is nearer than 1.5 stop-distances, one wick ends the trade before your stop can.

Frequently asked

How do I calculate position size for crypto futures?

Divide the amount you're willing to lose (account size × risk %) by the distance between entry and stop loss. That gives you position size in base units; multiply by entry price for the notional value in USDT. Leverage does not change your risk — only your margin.

How is the suggested leverage chosen?

We take the highest common rung (1, 2, 3, 5, 10, 15, 20) whose estimated liquidation price still sits at least 1.5 stop-distances beyond your stop loss, then cap it at 20×. If no rung qualifies, the stop is too wide for futures at that size.

Why does TP1 need to be 0.42% away from entry?

Taker fees on a round trip cost roughly 0.14%. Requiring TP1 to sit at least three times that (0.42%) away from entry means fees and slippage can't consume the whole move. Anything tighter is a fee-donation trade.

Is the liquidation price exact?

No. It's an isolated-margin estimate using a 0.5% maintenance-margin allowance. Every exchange uses its own tiered maintenance margin, so treat the number as a safety guide and confirm it on your exchange before sizing up.

Keep reading

Estimates only — technical analysis, not financial advice. Confirm margin and liquidation figures on your exchange.