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Position Size Calculator

Size a trade based on how much you're willing to risk.
Shares to buy
62
Position size
$6,200
Amount at risk
$500

Disciplined investors decide how much to lose before they decide how much to make. This calculator sizes a position from your account value, the percentage you're willing to risk, and the distance to your stop-loss — so a single idea can't sink your portfolio.

Frequently asked questions

How much of my account should I risk per position?

Many risk-managed investors cap the loss on any single position at 1–2% of total account value. This keeps a string of losing trades survivable.

What is a stop-loss?

A stop-loss is a predetermined price at which you'll exit to cap your loss. The distance between your entry and stop, combined with your risk budget, determines how many shares you can buy.

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