# Correlation Coefficient Calculator

> Calculate the Pearson correlation coefficient r from paired x and y values. Returns r, r squared, and a plain-English strength label.

**URL:** https://www.calculatoranswers.com/correlation-coefficient-calculator
**Category:** Education

## Quick Answer

Compute Pearson's correlation coefficient for two variables. Enter your data pairs to find the strength and direction of their linear relationship.

## Definition

A correlation coefficient calculator computes Pearson's r, which measures the strength and direction of the linear relationship between two variables. The calculator processes coordinate pairs (X, Y) to yield a value between negative one and positive one. A value near positive one indicates a strong positive linear correlation, a value near negative one indicates a strong negative linear correlation, and a value near zero indicates no linear correlation. Statisticians and researchers use this tool to identify trends and analyze relationships within experimental datasets.

## How to Use

1. **Input your data pairs** — Enter the coordinate values for variables X and Y, separated by commas or line breaks.
2. **Perform the calculation** — Click the calculate button to process the datasets.
3. **Review correlation metrics** — View Pearson's r, the coefficient of determination, and the significance level of the correlation.

## Disclaimer

This calculator provides estimates for educational and planning purposes. Always consult a qualified professional for specific advice on financial, medical, legal, or other regulated decisions.

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