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Statistics Calculator
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Free online tool

Coefficient of Determination Calculator

Enter two lists with matching rows. Calculate r², SSE, SST and the model convention. Review the method and copy or download your results.

Enter a grid, paste values, or choose CSV, TSV, JSON, JSON Lines, XLSX, text or a statistics project. XLSX requires a worksheet choice and imports values only. Review headers and column mapping before calculating. The workspace supports up to 2 MB, 20,000 rows and 100,000 cells.

Import settings

Column mapping is available after opening the data. JSON object keys become column names. Grid column names are separate from its data rows.

  1. Enter two lists with matching rows
  2. Check your values and calculation settings.
  3. Calculate, review the method, and save your results.

How it works

Calculate r², SSE, SST and the model convention from your own values. Use the fictional sample to try the calculation. The default fits a least-squares line with an intercept. Supplied-prediction mode uses R² = 1 − SSE / SST and can produce a negative result. Constant observed values have undefined R².

Enter data, review the result, and download it when you are ready. No account is required. Check the input and the output before using them for consequential decisions.

Choose a tool

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