Position Size Calculator

Why Position Sizing Matters

Position sizing is one of the most overlooked aspects of trading perpetual futures. With leverage available up to 50x or more on some protocols, a small adverse move can wipe out a large portion of your collateral if position size isn’t calibrated to your risk tolerance. The standard rule is to risk no more than 1–2% of total capital on any single trade, regardless of leverage used.

Leverage amplifies both gains and losses proportionally. A 10x leveraged position on a 5% adverse move results in a 50% drawdown on your margin — and at 20x, that same move liquidates the position entirely. Understanding the relationship between notional size, margin requirement, and liquidation price is essential before opening any leveraged trade.

This calculator helps you work backwards from your risk parameters. Enter your account size, the percentage you want to risk, your stop-loss distance, and your chosen leverage — and get the correct position size and margin to commit. Use it to size positions consistently rather than guessing.

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