Effect Size (Cohen's d)
Calculate Effect Size (Cohen's d) instantly with the exact formula and a worked example. Free online calculator — no signup, works on mobile.
Effect Size (Cohen's d)
(μ₁ − μ₂) / σ_pooled
Cohen's d
0.5
More about: Effect Size (Cohen's d)
What it calculates
The “Effect Size (Cohen's d)” calculator computes Cohen's d from 1 parameter: (μ₁ − μ₂) / σ_pooled.
A core calculation for studying, engineering tasks, and checking solutions.
Example calculation
With parameters (μ₁ − μ₂) / σ_pooled = 0.5 the result is 0.5.
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.