Here is what excel says about each.
Floor and ceiling functions excel.
The ceiling and floor functions in excel are somewhat complimentary to the mod function.
If the number is already an exact multiple no rounding occurs and the original number is returned.
Unlike roundup or rounddown excel s floor and ceiling functions can round the decimal places of a value to be divisible by a.
Unlike roundup or rounddown function in excel floor and ceiling functions will round the decimal places of a value to be divisible by a number you specify.
Mod returns a remainder after a number is divided by a divisor mod number divisor ceiling rounds a number up to the nearest multiple of significance ceiling number significance.
The excel floor function rounds a number down to a given multiple.
The excel ceiling function works based on the rounding rules similar to floor s except that it generally rounds up away from 0.
Refer to the following file for the formulas of the above discussion.
How do the floor and ceiling functions work.
This is how ceiling function can be used to round up a value to the multiple of a number.
Floor number significance ceiling number significance where the number is your starting point and the significance is the multiple you want your number rounded down to for floor or up to for ceiling.
Floor in excel is in the list of the basic rounding functions in excel though it works in a similar manner like mround function in excel the only difference is that it always pushes down the number to the nearest multiple of the significance.