Excel: Floor Function
In Excel, the Floor function returns a number rounded down based on a multiple of significance.
The syntax for the Floor function is:
Floor( number, significance )
number is the number that you wish to round down.
significance is the multiple of significance that you wish to round a number to.
Note:
If the sign of the number and the significance parameters are different, the Floor function will return the #NUM! error.
Applies To:
- Excel 2007, Excel 2003, Excel XP, Excel 2000
For example:
Let's take a look at an example:

Based on the Excel spreadsheet above:
=Floor(A1, 1) would return 169 =Floor(A1, 0.05) would return 169.65 =Floor(A2, 0.05) would return 169.6 =Floor(A3, 2) would return 2 =Floor(A4, 2) would return #NUM! =Floor(-4.5, -1) would return -4