Pearson r² (lite)

Client

Share of variance explained by linear fit.

R² from two lists

Square of Pearson r from paired comma lists. Non-linear relationships may still show high r² on monotone data—inspect a scatter plot separately. Processing runs in your browser—Toolcore does not need your paste for the core operation on this page.

Educational statistics only—confirm assumptions and sample size before production analysis.

How to use

Paste or type in the main field, then read the output below. Use Load example when available, or open the page with ?q= / ?qb= so tickets and agents share the same input.

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Nearby workflows on Toolcore

  • R² (coefficient of determination) — R² from two comma-separated numeric lists. Useful when the same dataset needs another summary statistic.
  • Linear regression slope — Least-squares slope from x,y pairs—one per line. Useful when the same dataset needs another summary statistic.
  • Pearson correlation — r from x,y pairs—one per line. Useful when the same dataset needs another summary statistic.
  • Math expression evaluator — Evaluate basic + − × ÷ arithmetic with parentheses in your browser—no variables. Useful when the same dataset needs another summary statistic.

Common use cases

  • Pearson r² (lite) for quick local checks without uploading data.
  • Copy results into tickets, docs, or classroom notes.

Common mistakes to avoid

  • Unexpected input shape

    See the intro and how-to notes for accepted formats.

FAQ

Is processing local?

Yes—this runs entirely in your browser.

Agent prefill?

Use q or qb for the main text field when supported.

More tools

Related utilities you can open in another tab—mostly client-side.