Chi-Square
Calculate Chi-Square instantly with the exact formula and a worked example. Free online calculator — no signup, works on mobile.
Chi-Square
Σ (O−E)²/E
χ² (df)
5
More about: Chi-Square
What it calculates
The “Chi-Square” calculator computes χ² (df) from 1 parameter: σ (o−e)²/e.
A core calculation for studying, engineering tasks, and checking solutions.
Example calculation
With parameters Σ (O−E)²/E = 5 the result is 5.
How to use
- Enter the parameter values — every field above is adjustable with a slider.
- The result and related metrics are calculated automatically as you type.
- Use the additional metrics shown (if any) where needed.
- Copy the result or bookmark the page.