Is the R-Squared Calculator free to use?

Yes. R-Squared Calculator on The Daily Tools is completely free, requires no account, and runs entirely in your browser.

Does The Daily Tools store my inputs?

No. Your numbers and text never leave your device. The Daily Tools has no backend database for calculator inputs.

Who should use the R-Squared Calculator?

Anyone who needs a clear statistics calculation and wants to check the assumptions used.

How accurate is the R-Squared Calculator?

Results follow the standard formula shown on this page. They are estimates for planning — not a substitute for professional advice.

Can I use the R-Squared Calculator on mobile?

Yes. The Daily Tools is fully responsive and works on phones, tablets, and desktops.

R-Squared Calculator

Coefficient of determination R².

Private — runs in your browser Instant results

Actual Y values

Predicted Y values (ŷ)

Coefficient of determination (R²)

0.9367

Observations (n)5

R² = 1 − SS_res / SS_tot — fraction of variance in y explained by the model.

Calculate R² to measure how much variance in y is explained by x in a linear model. Compare models on the same data set. Use The Daily Tools' R-Squared Calculator for private, browser-based processing — no account or server upload required.

What is R-Squared Calculator?

R-Squared Calculator helps you coefficient of determination r². It belongs to the Regression group within statistics tools on The Daily Tools. Enter your values and review the result with the assumptions shown on the page.

Definition: R-Squared Calculator is a free, browser-based calculator for coefficient of determination R².

Formula

R² = 1 − (SS_res ÷ SS_tot)

Calculation steps

The core formula: R² = 1 − (SS_res ÷ SS_tot)
Enter your values in the fields above — units and assumptions are under your control.
The Daily Tools computes the result instantly in your browser using JavaScript.
Review the result panel for the primary output and supporting breakdown values.

Worked example

Example: Using the R-Squared Calculator

Inputs: Enter values relevant to regression — for example, the measurements or amounts described in the tool fields above.

Open the R-Squared Calculator and review the input fields.
Apply the formula: R² = 1 − (SS_res ÷ SS_tot)
Adjust inputs to compare scenarios side by side.

You receive an immediate coefficient of determination r² — useful for planning and comparison.

Use cases

Working through a regression question with clear inputs
Comparing inputs in the R-Squared Calculator
Using a focused tool instead of a general spreadsheet or manual calculation

Advantages

Browser-based processing — entered values and selected files are not sent to our servers
No account required
Instant results with a clean, readable interface
Transparent formula shown on this page

Limitations

Results are estimates and do not replace professional advice
Results are not saved by this tool after you leave or refresh the page

Frequently asked questions

Is the R-Squared Calculator free to use?: Yes. R-Squared Calculator on The Daily Tools is completely free, requires no account, and runs entirely in your browser.
Does The Daily Tools store my inputs?: No. Your numbers and text never leave your device. The Daily Tools has no backend database for calculator inputs.
Who should use the R-Squared Calculator?: Anyone who needs a clear statistics calculation and wants to check the assumptions used.
How accurate is the R-Squared Calculator?: Results follow the standard formula shown on this page. They are estimates for planning — not a substitute for professional advice.
Can I use the R-Squared Calculator on mobile?: Yes. The Daily Tools is fully responsive and works on phones, tablets, and desktops.

Sources & references

The Daily Tools Methodology

Key points

R-Squared Calculator is a free, browser-based calculator for coefficient of determination R².
Formula: R² = 1 − (SS_res ÷ SS_tot)
Private, browser-only processing
Private, browser-based processing