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Free Correlation
Calculator

Advanced browser-based Pearson and Spearman correlation calculator with raw-data scatterplot, confidence intervals, p-values, influence diagnostics, monotonicity checks, and reproducible reports.

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About Free Correlation Calculator

Measure linear or monotonic association with Pearson or Spearman correlation. Paste paired data, inspect the scatterplot, quantify uncertainty, identify influential points, and export a research-ready interpretation.

Workspace options

  • Confidence level (%)
  • Alternative hypothesis
  • Scatterplot trend
  • Axis names

Available actions

  • ☼ / ◐
  • Pearson r
  • Spearman ρ
  • Raw pairs
  • Summary r
  • Calculate correlation