Sum Every Nth Row in a List

At some point you may need to sum the value from every nth row in a large list. Excel does not provide a function for this. Excel has a few different Sum functions, but not one to sum the value from every other, or every third, fourth, or fifth row in a list.

The spreadsheet below contains totals in every fifth row starting from row 3. We want to only add these sales totals.

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Sum a Column Ignoring Formula Errors

Having formula errors on a spreadsheet can be bad news. They look ugly, they frighten the less Excel experienced among us and they stop our other formulas from working.

If you have formula errors on a spreadsheet it is normally best to stop it at its source. To either correct the error, or to hide it using formulas such as ISERROR and IFERROR.

However, if your spreadsheet is large, having these IFERROR functions in every cell to protect against error values will add more calculation time to your spreadsheet.

There is a function in Excel called AGGREGATE which allows us to perform various functions on a range whilst ignoring formula errors.

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Perform Quick Calculations in Excel

It is possible to perform quick calculations in Excel without having to write any formulas. This technique is brilliant and provides the formula result you need quickly and easily.

You can count, sum, average and find the maximum or minimum number in a range simply by selecting the numbers you want to calculate. Continue reading