Correlation Coefficient Calculator
Calculate Pearson correlation coefficient
About this calculator
The Correlation Coefficient Calculator computes the Pearson correlation coefficient, a statistical measure that determines the strength and direction of linear relationships between two variables. This tool is essential for researchers, analysts, and students who need to quantify how closely two datasets are related. The correlation coefficient ranges from -1 to +1, where values closer to -1 indicate strong negative correlation, values near +1 show strong positive correlation, and values around 0 suggest no linear relationship between the variables.
How to use
Enter your paired data points for both variables into the calculator fields, separating values with commas or line breaks. Ensure you have the same number of data points for both variables. Click calculate to instantly receive the Pearson correlation coefficient along with interpretation of the relationship strength.
Frequently asked questions
What does a correlation coefficient of 0.7 mean?
A coefficient of 0.7 indicates a strong positive correlation, meaning as one variable increases, the other tends to increase significantly.
Can correlation prove causation between variables?
No, correlation does not imply causation. A strong correlation only shows variables move together, not that one causes the other.
What's the minimum sample size needed for reliable results?
Generally, at least 30 data points are recommended for reliable correlation analysis, though smaller samples can provide initial insights.