Position Size Calculator

Most retail crypto traders obsess about entry price. The experienced ones obsess about position size. Here's why: if your entry is wrong but your size is right, you take a small loss and move on. If your entry is right but your size is wrong, a normal volatility move can wipe out years of gains. Position size is the variable that decides whether a bad week ends your portfolio or just dents it.

For a halal investor the calculus is the same — but with one added discipline: spot only, no leverage, ever. That removes the most common “solution” people reach for when they want a bigger position than their portfolio supports. You can't margin into a 5x position. You have to size correctly the first time.

This calculator does the arithmetic for you. Enter your portfolio size, pick your tier (Conservative, Moderate, or Multi-X — each carries a different default risk per trade), then enter the entry price. The output is the exact dollar position size and unit count that satisfies both the tier's risk-per-trade rule and the tier's concentration cap.

Conventional position-sizing calculators usually assume you might use margin. They'll happily tell you to put 80% of your equity into one position because the math works on paper. For a halal investor that's irrelevant — margin is debt, debt is riba, riba is haram.

This calculator is built for spot-only sizing. Every position is assumed to be a fully-settled spot purchase using cash you already have. There's no debt, no margin call, and no liquidation cascade. A stop-loss can reduce downside in normal market conditions, but fast markets can gap through it. The point is to size the position before risk reaches the account.

The downside discipline is the upside discipline. Knowing the worst case is bounded means you can hold through volatility without panic-selling. The trader who respects position sizing is the trader who survives the cycle.