Free Correlation Coefficient Calculator
Pearson's r between two paired data sets.
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Result
Correlation coefficient (r)
0.9879
Strong positive correlation
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Short answer
Pearson's r between two paired data sets.
What is the Correlation Coefficient Calculator?
Pearson's r between two paired data sets.
How does the Correlation Coefficient Calculator work?
Enter the inputs above and read the result.
Formula
Variables
rPearson correlation, from −1 to 1
Explanation
r near ±1 indicates a strong linear relationship; near 0 indicates little linear association.
Examples
Applications
Advantages
Limitations
Common mistakes
Tips
Related concepts
The Correlation Coefficient Calculator sits inside the Math Calculators hub, in the statistics & probability cluster. Describing data and quantifying uncertainty. Understanding the terms below makes the output easier to interpret and easier to compare against neighbouring measures.
Practical use cases and industry applications
Understanding Correlation Coefficient
Pearson's r between two paired data sets. Within math calculators, correlation coefficient belongs to the statistics & probability cluster, where it shares terminology and assumptions with closely related tools.
Learning how correlation coefficient is calculated
r near ±1 indicates a strong linear relationship; near 0 indicates little linear association. Working through the variables one at a time — r — makes the result reproducible by hand and easier to sanity-check.
Using correlation coefficient to make a decision
Because outputs depend on the assumptions you enter, run more than one scenario before committing to a figure.
How correlation coefficient compares with related measures
distribution, dispersion, significance, sample all describe adjacent aspects of statistics & probability. Comparing this calculator's output against those measures — using the related tools listed on this page — prevents a single metric from being read in isolation.
Frequently asked questions
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