CalcNest AI

Correlation Coefficient Calculator

Calculate Pearson's correlation coefficient to measure the linear relationship between two data sets.

About Correlation Coefficient Calculator

Calculate Pearson's correlation coefficient to measure the linear relationship between two data sets.

Formula

r = [nΣxy – ΣxΣy] / √[(nΣx² – (Σx)²)(nΣy² – (Σy)²)]

Example

X: 1,2,3,4,5 and Y: 2,4,5,4,5 → r ≈ 0.80 (strong positive).

How to Use

Enter your values in the fields above and click "Calculate" to get instant results. All calculations happen in your browser — nothing is sent to any server.

Frequently Asked Questions

What is Correlation Coefficient Calculator?
Calculate Pearson's correlation coefficient to measure the linear relationship between two data sets.

What formula does this use?
This calculator uses: r = [nΣxy – ΣxΣy] / √[(nΣx² – (Σx)²)(nΣy² – (Σy)²)]

Is this calculator free?
Yes! All calculators on CalcNest AI are 100% free with no account required.

Is my data safe?
Absolutely. All calculations run locally in your browser. We never store or transmit your input data.

Related Calculators