Correlation Coefficient Calculator

Calculate Pearson correlation for paired observations.

InputsChange a value to recalculate instantly

x₁

y₁

x₂

y₂

x₃

y₃

x₄

y₄

ResultUpdates as you type

Pearson r0.98

Covariance numerator9.5

Sample size4

How it worksTransparent math

Formular=Sxy/√(SxxSyy)

Pearson correlation measures the strength and direction of linear association. It is undefined when either variable has zero variance.

Result breakdownSee the important numbers together

1Pearson r0.98

2Covariance numerator9.5

3Sample size4

λ DooMathWork with this calculation

Local · deterministic · optional

auto_awesome

Quick mathNatural-language-style shortcuts for deterministic arithmetic.

Calculator guide

How to use the Correlation Coefficient Calculator

Calculate Pearson correlation for paired observations.

01Set inputsChoose values, units and assumptions.

02Apply the modelr = cov(x,y)/(σxσy)

03Read the resultCheck the output against the assumptions before using it.

menu_book

Calculate Pearson correlation for paired observations.

functions

r = cov(x,y)/(σxσy)

fact_check

Review the inputs, units and assumptions before using the result for a real decision.