Pearson Correlation Calculator
Measure linear correlation between two variables — r from −1 to +1.
How to use Pearson Correlation Calculator
Follow these steps — everything happens instantly in your browser.
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Step 1. Enter paired data as 'x,y' pairs, one per line.
- 2
Step 2. The Pearson r value updates instantly.
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Step 3. Interpret the result: closer to ±1 = stronger correlation.
Why use this tool
Private by design
All processing happens locally in your browser. Open DevTools → Network and you'll see zero file uploads. Ever.
Instant
No upload wait, no queue, no server round-trip. Results appear the moment you drop a file.
Free & unlimited
No accounts, no watermarks, no daily caps. Use it as many times as you like, forever.
Works everywhere
Desktop, tablet or phone — every tool is responsive and installable as a PWA for offline use.
Frequently asked questions
Everything you might want to know about pearson correlation calculator.
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