CI width
Calculate CI width instantly with the exact formula and a worked example. Free online calculator — no signup.
CI width
Mean
SE
z (1.96=95%)
CI width
19.6
Mean
100
Lower
90,2
Upper
109,8
More about: CI width
What it calculates
The “CI width” calculator computes CI width from 3 parameters: mean, se, z (1.96=95%).
A core calculation for studying, engineering tasks, and checking solutions.
Example calculation
With parameters Mean = 100, SE = 5, z (1.96=95%) = 1.96 the result is 19.6.
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.