Exceljet

Quick, clean, and to the point

Excel FLOOR Function

Excel FLOOR function
Summary 

The Excel FLOOR function rounds a given number down to the nearest specified multiple. FLOOR works like the MROUND function, but FLOOR always rounds down.

Purpose 
Round a number down to the nearest specified multiple
Return value 
A rounded number.
Syntax 
=FLOOR (number, multiple)
Arguments 
  • number - The number that should be rounded.
  • multiple - The multiple to use when rounding.
Usage notes 

The Excel FLOOR function rounds a number down to a given multiple. FLOOR works like the MROUND function, which also rounds to a given multiple, but FLOOR always rounds down.

Example #1 - round down to nearest 5

To round a number in A1 down to the nearest multiple of 5:

=FLOOR(A1,5) // round down to nearest 5

Example #2 - round pricing down to end with .99

FLOOR can be used to set pricing after currency conversion, discounts, etc. For example, the formula below will round a number in A1 down to the nearest 1 dollar, then subtract 1 cent, to get a price like $2.99, $5.99, $49.99, etc.

=FLOOR(A1,1)-0.01

You can round pricing up to end in .99 with a similar formula based on the CEILING function:

=CEILING(A1,1)-0.01

Example #3 - round time down to nearest 15 minutes

FLOOR can be used to round time down to a given multiple. For example, to round a time in A1 down to the nearest 15 minutes, you can use FLOOR like this:

=FLOOR(A1,"0:15") // round time down to nearest 15 min

Other rounding functions in Excel

Notes

  • FLOOR works like the MROUND function, but FLOOR always rounds down.
  • If a number is already an exact multiple of significance, no rounding occurs.
  • FLOOR rounds positive numbers down toward zero.
  • FLOOR rounds negative numbers down away from zero.
  • For more control with negative numbers, see the FLOOR.MATH function.

Excel Formula Training

Formulas are the key to getting things done in Excel. In this accelerated training, you'll learn how to use formulas to manipulate text, work with dates and times, lookup values with VLOOKUP and INDEX & MATCH, count and sum with criteria, dynamically rank values, and create dynamic ranges. You'll also learn how to troubleshoot, trace errors, and fix problems. Instant access. See details here.