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ISODD
ISODD checks whether a number is odd, returning TRUE when dividing by 2 leaves a remainder of 1. Like ISEVEN, it truncates decimals before evaluating. Use it for alternate row shading, grouping records, or any logic that depends on whether a sequential number is odd.
Excel
=ISODD(A2)Google Sheets
=ISODD(A2)✓
Verified example
Computed by a real spreadsheet engine on the sample data below.
| Number | IsOdd? |
| 3 | TRUE |
| 8 | FALSE |
| 11 | TRUE |
=ISODD(A2)→TRUE
Try it with your data
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Sample data — click any cell to edit
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How it works
- 1Supply a number or cell reference to ISODD (e.g., =ISODD(A2)).
- 2It returns TRUE for odd numbers (1, 3, 5, …) and FALSE for even numbers including 0.
- 3Pair with IF or conditional formatting rules to apply different styling or logic to odd versus even rows.
Need a version for your data?
Try: “Separate my list into odd and even numbered items using a formula”