Confidence Level
Calculate Confidence Level instantly with the exact formula and a worked example. Free online calculator — no signup, works on mobile.
Confidence Level
1 − α%
%
CI
95%
More about: Confidence Level
What it calculates
The “Confidence Level” calculator computes CI in % from 2 parameters: 1 − α (%), %.
A core calculation for studying, engineering tasks, and checking solutions.
Example calculation
With parameters 1 − α = 100 %, % = 95 the result is 95 %.
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.