Select the cell where you want the average to appear
Type `=AVERAGE(range)`
Replace `range` with the cells you want to average, such as `A1:A10`
Press Enter
Use `=AVERAGE(A1:A10)` for a single continuous range
Use `=AVERAGE(A1,A3,A5)` for non-adjacent cells
Use `=AVERAGEIF(range, criteria, [average_range])` for conditional averages
Use `=AVERAGEIFS(average_range, criteria_range1, criteria1, …)` for multiple conditions
Use the AutoSum dropdown and choose Average
Check that the cells contain numeric values and not text
Ignore blank cells automatically included by the AVERAGE function