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Pearson Correlation (r)

Calculate Pearson Correlation (r) instantly. Free online calculator with the exact formula, a worked example, and metric units. No signup required.

Pearson Correlation (r)

x₁
y₁
x₂
y₂
Pearson r
1
Σ(x−x̄)(y−ȳ) / √(Σ(x−x̄)²·Σ(y−ȳ)²)Calculate Pearson Correlation (r) instantly. Free online calculator with the exact formula, a worked example, and metric units. No signup required.

More about: Pearson Correlation (r)

What it calculates

The “Pearson Correlation (r)” calculator computes Pearson r from 4 parameters: x₁, y₁, x₂, y₂.

A core calculation for studying, engineering tasks, and checking solutions.

Example calculation

With parameters x₁ = 1, y₁ = 2, x₂ = 2, y₂ = 4 the result is 1 (Σ(x−x̄)(y−ȳ) / √(Σ(x−x̄)²·Σ(y−ȳ)²)).

How to use

  1. Enter x₁, y₁, x₂ and y₂ — each field above is adjustable with a slider.
  2. Pearson r is calculated automatically as you type.
  3. Check the worked example below to see the formula applied to real numbers.
  4. Copy the result or bookmark this calculator.

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FAQ

How is Pearson Correlation (r) calculated?
The Pearson Correlation (r) calculator computes Pearson r from x₁, y₁, x₂, y₂. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Pearson Correlation (r) calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.

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