91st percentile represents the value of the 91st rank in a given set of data. Percentile value is represented as R, and is given as R = 0.91x (N+1) where, R is the percentile rank and N is the number of data. This page provides you the 91st Percentile formula to calculate the 91st percentile for your desired data set. This is a simple formula to calculate the 91st percentile. Use this simple data analysis statistics formula to solve your Percentile related problems.

Where,

R = Percentile Rank

N = Number of Data

The above 91st Percentile formula in this page involves multiplication factor of 0.91 with the number of data added by 1. Also, you can use the related calculator to check your result.