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R Squared Calculator
Compute R-squared from sums of squares.
📉 Free Online Tool
⚡ Instant Results
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🔒 100% Free Tool
R squared
Compare Your Options And Get Clear Answers
Compute R-squared from sums of squares.
R Squared Estimator
Enter your numbers below for an instant estimate.
0
💡 Tip: R2 = 1 – SSR / 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
R Quick Guide
Typical values for reference.
| R2 | Fit | Meaning | Note |
|---|---|---|---|
| 0.9+ | Excellent | Very strong | Check overfit |
| 0.7-0.9 | Good | Strong | Typical |
| 0.4-0.7 | Moderate | Some | Context |
| Under 0.4 | Weak | Poor | Rethink |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
R Squared Calculator FAQ
Answers to common questions about this calculator.
The proportion of variance in the outcome explained by the model.
It gives a quick estimate of r squared from the values you enter.
No. It is a planning estimate, so check important figures with a professional or official source.
Yes. Edit any field and the result updates when you calculate.