Cohen's f
Calculate Cohen's f instantly with the exact formula and a worked example. Free online calculator — no signup.
Cohen's f
η² (or R²)
Cohen's f
0.333333
η²
0,1
Cohen's f
0,3333
Effect
large
More about: Cohen's f
What it calculates
The “Cohen's f” calculator computes Cohen's f from 1 parameter: η² (or r²).
A core calculation for studying, engineering tasks, and checking solutions.
Example calculation
With parameters η² (or R²) = 0.1 the result is 0.3333 (f = √(η²/(1−η²))).
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.