MS Access: Avg Function
In Microsoft Access, the Avg function returns the average (arithmetic mean) of a set of numeric values in a select query.
Syntax
The syntax for the Avg function is:
Avg ( expression )
expression is a numeric value. It can be a field or a formula that evaluates to a numeric expression.
Applies To
- Access 2013, Access 2010, Access 2007, Access 2003, Access XP, Access 2000
SQL/Queries
You can use the Avg function in a query by clicking on the Totals button in the toolbar (This is the button with the summation symbol). The Avg function is used in conjunction with the Group By clause.

This query would return the average UnitPrice by ProductName.