Statistics & Probability
Instant, private, and free
99 Confidence Interval Calculator.
Calculate 99 confidence interval from explicit inputs using the documented formula.
On-device calculationNo signup
01
Set your values
Results update as you type.
02 / ANSWER
lower: 45.8784
upper: 54.1216
marginOfError: 4.1216
Results update automatically as you type.
FAQs
What does this calculator assume?
Calculate 99 confidence interval from explicit inputs using the documented formula. No unstated input convention is inferred.