# A to Z of Excel Functions: The CEILING.MATH Function

10 April 2017

*Welcome back to our regular A to Z of Excel Functions blog. Today we look at the CEILING.MATH function. *

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**The CEILING.MATH function**

This function sounds like something you calculate whilst swinging from the chandeliers. That’s not the case though, exciting as it sounds. This function actually rounds a number up to the nearest integer or to the nearest multiple of significance *(see below)*.

The **CEILING.MATH **function employs the following syntax to operate:

**CEILING.MATH(number, [significance], [mode])**

The **CEILING.MATH** function has the following arguments:

**number:**this is required. This**number**must be less than 9.99E+307 and greater than -2.229E-308**significance:**this is optional. This represents the multiple to which**number**is to be rounded**mode:**also optional. For negative numbers, this controls whether**number**is rounded toward or away from zero.

It should be further noted that:

- by default, significance is +1 for positive numbers and -1 for negative numbers
- by default, positive numbers with decimal portions are rounded up to the nearest integer. For example, 6.3 is rounded up to 7
- by default, negative numbers with decimal portions are rounded up (toward zero) to the nearest integer. For example, -6.7 is rounded up to -6
- by specifying the
**significance**and**mode**arguments, you can change the direction of the rounding for negative numbers. For example, rounding the**number**-6.3 to a**significance**of 1 with a**mode**of 1 rounds away from 0, to -7. There are many combinations of**significance**and**mode**values that affect rounding of negative numbers in different ways - the
**mode**argument does not affect positive numbers - the
**significance**argument rounds the**number**up to the nearest integer that is a multiple of the**significance**specified. The exception is where the**number**to be rounded is an integer. For example, for a**significance**of 3 the**number**is rounded up to the next integer that is a multiple of 3 - if
**number**divided by a**significance**of 2 or greater results in a remainder, the result is rounded up.

Please see my example below:

*We’ll continue our A to Z of Excel Functions soon. Keep checking back – there’s a new blog post every other business day.*