How to Average the Last N Values in Excel
In Excel there are a lot of built-in functions, and AVERAGE is one of the most frequently used functions. We can apply it to calculate the average of numbers from a given range reference. In daily work, we may apply AVERAGE function together with some other functions to get average based on some conditions. For example, get the average of sales in the nearest 3 days. In this article, we will let you know the method to apply AVERAGE function together with OFFSET function and COUNT function to get the average of last N values from a dynamic range.
In this article, we will introduce you the syntax, arguments, and basic usage of above three functions. We will also explain how the formula works with these functions.
In this case, we want to calculate the average of the last 3 values in “Amount” column. If “Amount” range is a fixed range, we can directly create formula “=AVERAGE(C4:C6)” to get the average of last 3 values. If this range is a dynamic range, for example add a new line for date 5/31/2021, the last 3 values are changed due to a new row is inserted. So, the simple formula with only AVERAGE function doesn’t work.
To get the average of last N values for a dynamic range, we can apply AVERAGE function together with other functions to help us. In this article, to approach our goal, we also apply OFFSET function together with COUNT function to help us set our average range.
