ISO.CEILING
Returns a number rounded up to the nearest integer or to the nearest multiple of significance, following the ISO standard (always toward positive infinity).
ISO.CEILING(number, [significance])Arguments
numberThe number to round.significanceOptional. The multiple to round to (default 1). Sign is ignored.(optional)
=ISO.CEILING(4.3)Rounds up to nearest integer
=ISO.CEILING(-4.3)Always rounds toward +∞ (less negative)
=ISO.CEILING(7,3)Rounds up to nearest multiple of 3
- •Behaves identically to CEILING.PRECISE — provided for ISO/IEC 29500 compatibility
- •Sign of significance is ignored
- •Use CEILING.MATH if you need control over negative-number rounding direction
- •Not realizing ISO.CEILING and CEILING.PRECISE are functionally identical - choosing one over the other rarely matters except for stylistic consistency or explicit ISO/IEC 29500 standard compliance requirements
- •Expecting the significance argument's sign to matter - like CEILING.PRECISE, it's always ignored and treated as positive
- •Needing control over which direction negative numbers round and reaching for ISO.CEILING instead of CEILING.MATH, which is the version that actually offers that control via its mode argument
CEILING.PRECISEBehaves identically to ISO.CEILING - the two exist as separate names mainly for standards-compatibility reasons rather than functional differences.CEILING.MATHOffers a mode argument for explicit control over negative-number rounding direction, something ISO.CEILING's fixed behavior doesn't provide.FLOOR.MATHRounds down instead of up, the counterpart operation to what ISO.CEILING (and CEILING.MATH) perform.What's the difference between ISO.CEILING and CEILING.PRECISE?
None functionally - they behave identically. ISO.CEILING exists specifically for compatibility with the ISO/IEC 29500 spreadsheet standard, while CEILING.PRECISE is Excel's own naming for the same behavior.
Does ISO.CEILING care about the sign of significance?
No, like CEILING.PRECISE, the sign is always ignored and treated as positive.
If I need control over negative-number rounding direction, should I use ISO.CEILING?
No, use CEILING.MATH instead - it has a mode argument specifically for that purpose, while ISO.CEILING's rounding direction toward positive infinity is always fixed.
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