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Coefficient of Determination Calculator
R squared from regression sums of squares, or from a correlation coefficient r.
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R squared
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R squared from regression sums of squares, or from a correlation coefficient r.
Coefficient of Determination Estimator
Enter your numbers below for an instant estimate.
0
💡 Tip: R^2 = SSR / SST = 1 – SSE / SST.
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
Coefficient Quick Guide
Typical values for reference.
| SSR | SST | n | R squared |
|---|---|---|---|
| 100 | 500 | 30 | 0.2000 |
| 250 | 500 | 30 | 0.5000 |
| 420 | 500 | 30 | 0.8400 |
| 490 | 500 | 30 | 0.9800 |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Coefficient of Determination Calculator FAQ
Answers to common questions about this calculator.
The share of variance explained by the model.
Not always; overfitting and context matter.
R^2 = SSR / SST = 1 – SSE / SST.
It is an estimate based on the inputs you enter. Check real quotes, labels or official guidance for important decisions.