Margin of Error
Calculate Margin of Error instantly with the exact formula and a worked example. Free online calculator — no signup, works on mobile.
Margin of Error
σ/√n
MoE
1.96
More about: Margin of Error
What it calculates
The “Margin of Error” calculator computes MoE from 1 parameter: σ/√n.
A core calculation for studying, engineering tasks, and checking solutions.
Example calculation
With parameters σ/√n = 1 the result is 1.96.
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.