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Correlation Matrix Calculator
Paste multi-column numeric data and generate a Pearson correlation matrix with basic summary statistics for each variable.
How to use this tool
- Paste your numeric data with one row per observation and one column per variable.
- Check the correlation matrix to see how strongly each pair of variables is linearly related.
- Review per-variable means and standard deviations for context.
Pearson correlation calculator for quick analysis
- See all pairwise Pearson correlation coefficients in a single matrix.
- Quickly spot strong positive or negative linear relationships.
- Perfect for exploratory data analysis and homework exercises.
What this correlation matrix shows
- Diagonal entries are 1.0 where a variable is correlated with itself.
- Off-diagonal entries show Pearson correlation between pairs of variables.
- If a column has no variance or too few data points, correlations may be undefined.
FAQ
- Does this compute Pearson or Spearman correlation?
- This calculator computes Pearson correlation, which measures linear relationships. It does not currently compute Spearman rank correlation.
- How many variables can I include?
- You can paste as many columns as you like, but very wide matrices may be harder to read. The calculator is best suited to small and medium-sized data sets.
- What if some rows have missing values?
- Rows that cannot be parsed into numeric columns are skipped entirely. For best results, clean your data before pasting.
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