Beta Stock Calculator

Compute a stock's beta coefficient from historical returns vs a market series.

Last updated: 2026-04-02

Stock returns (%, comma-separated)

Market returns (%, comma-separated)

Beta (β)

1.353

Above market

5 data points

About Beta

Beta measures a stock's sensitivity to market movements. A beta of 1 moves with the market; greater than 1 indicates higher volatility relative to the market.

This tool computes beta using covariance divided by market variance on paired historical returns.

How to Use

Paste paired historical returns for the stock and the market, aligned and comma-separated.
Ensure both series have at least two matching points.
Interpret beta: >1 higher volatility, <1 lower volatility.