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Math and trigonometry

FLOOR.MATH Function

Rounds a number down to the nearest multiple of significance. Optionally rounds negative numbers towards zero.


by Charley Kyd, MBA
Microsoft Excel MVP, 2005-2014
The Father of Spreadsheet Dashboard Reports

Syntax

FLOOR.MATH(number, significance, mode)

  • number  Required. The value to be rounded down.
  • significance  Optional. The multiple to which the number is rounded. If omitted, the default value is 1.
  • mode  Optional.

Applies To

Excel 2013 and above

A Note About "Rounding"

In Excel, numbers can "round" in two ways.

First, they can round up or down. With this type of rounding, numbers get larger when they are rounded up, and smaller when they are rounded down.

Second, numbers can round towards zero or away from zero. When positive numbers are rounded towards zero, they get smaller; when negative numbers are rounded towards zero, they get larger.

Although Microsoft uses "round up" and "round down" to describe both types of rounding, we use "round up" or "round down" to describe the first type of rounding. And we use "round towards zero" or "round away from zero" to describe the second type.

Remarks

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Examples

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Other Help

Related Functions

In total, Excel 2013 offers 15 functions that round data in various ways. Here's a summary of Excel's rounding functions.

 

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