Percentile for Normal Distribution Calculator

<-- Enter μ
<-- Enter σ
<-- Enter percentile %
  

Given a mean μ of 1000, a standard deviation σ = 50, what is the 99% percentile ranking?

The z-score formula for a normal distribution is below
z  =  x - μ
  σ

Rearranging this formula by solving for x, we get:

x = μ + zσ
confcheck = 98
From our normal distribution table, an inverse lookup for 99%, we get a z-value of 2.326
In Microsoft Excel or Google Sheets, you write this function as =NORMINV(0.99,1000,50)

Plugging in our numbers, we get

x = 1000 + 2.326(50)
x = 1000 + 116.3
x = 1116.3



Add This Calculator To Your Website