Key differences
- SUMIF supports one condition; SUMIFS supports multiple conditions.
- SUMIFS is easier to extend when more conditions are expected later.
- SUMIFS uses condition-range and criteria pairs.
When to use SUMIF
- You only need one condition and want a shorter formula.
- Existing sheets rely on single-condition aggregation.
When to use SUMIFS
- You need two or more conditions.
- You expect conditions to increase over time.
Related guides and practice