We can easily find out the AutoSum button or formula in the Function Library group on the Formulas tab. See screen shot:

You can also find out the AutoSum button or formula in Editing group on the Home tab.

Automatically sum one or multiple columns in each page of a worksheet in Excel

Kutools for Excel’s Paging Subtotals utility can help you sum up one or more columns in each page and add the calculated results at the bottom of each page as below screenshot shown.

The hotkey or shortcut of AutoSum function are Alt + = keys in Excel.

Select a list of data in Excel, and then press the Alt + = keys simultaneously, and then it will add the sum value below this list.

Not only quickly get the sum value for a list of data in Excel, the AutoSum function can help us calculate the sum values of multiple rows and multiple columns at once.

Supposing you have three series of numbers in the Range A1:B2 from Sheet 1 to Sheet 3 as following screen shots shown, and you want to calculate the sum of these series of numbers across worksheets, how could you solve it?

Actually, we can enter the formula =SUM(Sheet1:Sheet3!A1:B2) into a blank cell and press the Enter key. Then you will get the total sum of three series of numbers across worksheets in the cell at once.

Note: The formula =SUM(Sheet1:Sheet3!A1:B2) requires the worksheets (Sheet1, Sheet 2, and Sheet 3) must be adjacently listing in the Sheet Tab bar, and the series of numbers must be in the same range (A1:B2) of each worksheet.

Let's say you have a purchase table as following screen shot shown, and now you want to calculate the total money with multiplying the Price column and Weight column and then automatically summing the multiplying results, you can get it done with the SUMPRODUCT function in Excel.

Select any blank cell, enter the formula =SUMPRODUCT(B2:B15,C2:C15) into it, and press the Enter key.

Note: In the formula of =SUMPRODUCT(B2:B15,C2:C15), B2:B15 is the Price column, C2:C15 is the Weight column, and you can change them based on your needs.

Sometimes, you may need to automatically sum multiple rows based on criteria in one column, you can try the Advanced Combine Rows utility of Kutools for Excel to settle this task at ease.

1. Select the range where you want to batch AutoSum multiple rows based on criteria, and click Kutools > Content > Advanced Combine Rows.

2. In the opening Advanced Combine Rows dialog box, please select the criteria column and click the Primary Key, select the column you will auto sum and click the Calculate > Sum, and click the Ok button. See screenshot above.

And now all rows in the selected range are automatically summed based on the criteria in the specified column. See screenshot: