## About this lesson

Learn to use SUMIF, COUNTIF and SUMPRODUCT to add cells only when certain conditions are met.

## Lesson versions

Multiple versions of this lesson are available, choose the appropriate version for you:

## Exercise files

Download the â€˜beforeâ€™ and â€˜afterâ€™ Excel workbooks from the video tutorial and try the lesson yourself.

Conditional Math.xlsx27.6 KB Conditional Math - Completed.xlsx

30.7 KB

## Quick reference

### Conditional Math

Using SUMIF and COUNTIF to add cells only when certain conditions are met.

### When to use

Useful when you need to summarize values only in cases where certain criteria are true.

### Instructions

SUMIF

- Allows provision of a range of values to examine, criteria to meet, and a different range to sum.
- Each row in the existing range is examined against the criteria.
- If a condition is met, then the matching row in the “sum range” is added to the total.
- Mathematical decisions provided as the criteria should be wrapped with quotes.
- =SUMIF(A1:A10,”>5”,B1:B10) will sum all records in B1:B10 where the corresponding value in A1:A10 is greater than 5.

COUNTIF

- Allows provision of a range of values to examine, a criteria to meet, and a different range to count.
- Each row in the existing range is examined against the criteria.
- If a condition is met, then the matching row in the “count range” is added to the total.
- Mathematical decisions provided as the criteria should be wrapped with quotes.
- =COUNTIF(A1:A10,”>5”,B1:B10) will count all records in B1:B10 where the corresponding value in A1:A10 is greater than 5.

SUMIFS

- Allows provision of a multiple ranges of values to examine, a criteria to meet, and a different range to SUM
- All tests must be true in order to have the value added in
- =SUMIFS(B1:B10,A1:A10,”>=2”,A1:A10,”<=5”,) will sum all records in B1:B10 where the corresponding value in A1:A10 is greater than or equal to 2 AND less than or equal to 5.
- SUMIFS did not exist in Excel 2003 and earlier. To achieve multiple condition sums in Excel 2003 and prior, you must use the SUMPRODUCT function.

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