Correlation Calculator
Pearson r between two variables.
Independent variable.
Dependent variable — same count as X.
Pearson correlation (r)
0.7746
Introduction
Compute the Pearson correlation coefficient and interpret strength and direction of linear association. See covariance and means used in the calculation. Use The Daily Tools' Correlation Calculator for private, browser-based processing — no account or server upload required.
What is Correlation Calculator?
Correlation Calculator helps you pearson r between two variables. 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: Correlation Calculator is a free, browser-based calculator for pearson r between two variables.
Formula
r = Σ((x−x̄)(y−ȳ)) ÷ √[Σ(x−x̄)² × Σ(y−ȳ)²]
Calculation steps
- The core formula: r = Σ((x−x̄)(y−ȳ)) ÷ √[Σ(x−x̄)² × Σ(y−ȳ)²]
- 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 Correlation Calculator
Inputs: Enter values relevant to regression — for example, the measurements or amounts described in the tool fields above.
- Open the Correlation Calculator and review the input fields.
- Apply the formula: r = Σ((x−x̄)(y−ȳ)) ÷ √[Σ(x−x̄)² × Σ(y−ȳ)²]
- Adjust inputs to compare scenarios side by side.
You receive an immediate pearson r between two variables — useful for planning and comparison.
Use cases
- Working through a regression question with clear inputs
- Comparing inputs in the Correlation 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 Correlation Calculator free to use?
- Yes. Correlation 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 Correlation Calculator?
- Anyone who needs a clear statistics calculation and wants to check the assumptions used.
- How accurate is the Correlation 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 Correlation Calculator on mobile?
- Yes. The Daily Tools is fully responsive and works on phones, tablets, and desktops.
Sources & references
Key points
- Correlation Calculator is a free, browser-based calculator for pearson r between two variables.
- Formula: r = Σ((x−x̄)(y−ȳ)) ÷ √[Σ(x−x̄)² × Σ(y−ȳ)²]
- Private, browser-only processing
- Private, browser-based processing