Pearson Correlation Coefficient Calculator

Correlation Calculator is a free online Math & Statistics tool that pearson and Spearman correlation, r², and the least-squares regression line for paired data instantly in your browser. Paste your data, adjust the options and get the result in real time — no installation, no sign-up, and nothing is ever uploaded to a server. No download or account is required: the tool loads in under a second and works offline-friendly after the first visit.

How to use

Using Correlation Calculator takes three steps:

  1. Paste your data into the input box (or load the example).
  2. Configure the options to match your target format or scenario.
  3. Copy, download or inspect the output — it updates live as you type.
  4. No download or account is required: the tool loads in under a second and works offline-friendly after the first visit.

Examples

1, 2.1
2, 4.0
3, 5.9
4, 8.1
5, 9.8
6, 12.2

Use cases

  • Pearson and Spearman correlation, r², and the least-squares regression line for paired data.
  • Because everything is computed client-side, Correlation Calculator is safe to use with sensitive data such as API keys, tokens or private logs.

FAQ

What is Correlation Calculator?

Correlation Calculator pearson and Spearman correlation, r², and the least-squares regression line for paired data. It runs entirely in your browser, so your data stays private.

Is Correlation Calculator free to use?

Yes. Correlation Calculator is free, unlimited and works without registration or installation.

Does my data get uploaded?

No. All processing happens locally in your browser; nothing is sent to any server.

Runs 100% in your browser — your data never leaves your device.

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