Two-Proportion z-Test
Calculate Two-Proportion z-Test instantly with the exact formula and a worked example. Free online calculator — no signup, works on mobile.
Two-Proportion z-Test
p₁
p₂
n₁
n₂
z
1.5831
More about: Two-Proportion z-Test
What it calculates
The “Two-Proportion z-Test” calculator computes z from 4 parameters: p₁, p₂, n₁, n₂.
A core calculation for studying, engineering tasks, and checking solutions.
Example calculation
With parameters p₁ = 0.5, p₂ = 0.45, n₁ = 500, n₂ = 500 the result is 1.58.
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.