Correlation Coefficient Calculator
Use this correlation coefficient calculator to measure the linear relationship between two data sets. Enter paired values for the two variables and review a correlation coefficient and relationship direction.
Correlation coefficient (r)
—
r² (variance explained) —
Strength —
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How it works
r = Σ((x−x̄)(y−ȳ)) ÷ √(Σ(x−x̄)² × Σ(y−ȳ)²)How to use the Correlation Coefficient Calculator
Start by entering paired values for the two variables. Keep the units consistent and check that each value belongs to the same question.
The result gives a correlation coefficient and relationship direction. Correlation does not prove that one variable causes the other. Use it as a guide and check any instructions, rules or professional advice that apply.
Frequently Asked Questions
What does this correlation coefficient calculator calculate?
It gives a correlation coefficient and relationship direction. Correlation does not prove that one variable causes the other.
What information should I enter?
Enter paired values for the two variables. Use the same units throughout so the result is easier to understand.
What does a value near zero mean?
It indicates little linear relationship in the entered data, though other patterns may still exist.