Pearson Correlation
MATHEMATICS
Pearson Correlation
Measure linear association between paired values, without implying causation.
UNDERSTAND YOUR RESULT
How it works
Measure linear association between paired values, without implying causation.
THE CALCULATIONr = centered cross-product / product of centered norms
Using this calculator
Enter x values, paired y values. r = centered cross-product / product of centered norms.
What to keep in mind
Finite real numbers unless a complex or exact-integer result is specified. Outputs are rounded for display. Matrix calculations use floating-point arithmetic.
Frequently asked questions
Are my entries saved?
No. Calculator inputs remain in the current page and are cleared when you reload or leave. The tools do not upload your entries.
Why are results rounded?
The display is rounded for readability. Calculations use unrounded intermediate values. An estimate should not be interpreted as an exact measurement.