How to calculate Standard Deviation in Excel The Standard Deviation is a term used in statistics. The term describes how much the numbers if a set of data vary from the mean.

Percentages aren't always easy to calculate, but one of the best tools in Excel's toolbox is calculating percentages for you. Here's how to do it.

Learn how to calculate the net present value (NPV) of your investment projects using Excel's XNPV function.

Calculating the return One of the best methods for calculating an average return for a stock investment is the XIRR function in Excel.