Note: STDEV.P replaces the STDEVP function, with identical behavior. Although STDEVP still exists for backwards compatibility, Microsoft recommends that people use the newer STDEV.P function instead.

Standard Deviation functions in Excel

The table below summarizes the standard deviation functions provided by Excel. Notes:

STDEV.P calculates standard deviation using the “n” method, ignoring logical values and text. STDEV.P assumes data is an entire population. When data is a sample only, use the STDEV.S function. Numbers are supplied as arguments. They can be supplied as actual numbers, ranges, arrays, or references that contain numbers. To evaluate logical values and/or numbers as text in a reference, use the STDEVA function.

Dave Bruns

Hi - I’m Dave Bruns, and I run Exceljet with my wife, Lisa. Our goal is to help you work faster in Excel. We create short videos, and clear examples of formulas, functions, pivot tables, conditional formatting, and charts.