# Excel FLOOR Function

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*.

**number**- The number that should be rounded.**significance**- The multiple to use when rounding.

The Excel FLOOR function rounds a number down to a given multiple. The multiple to use for rounding is provided as the *significance* argument. If the number is already an exact multiple, no rounding occurs and the original number is returned.

FLOOR works like the MROUND function, but unlike MROUND, which rounds to the *nearest* multiple, 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 next whole dollar, then subtract 1 cent, to return 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 understands time formats, and can be used to round time down to a given multiple. For example, to round a time in A1 down to the previous 15 minute unit, you can use FLOOR like this:

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

### Other rounding functions in Excel

- To round normally, use the ROUND function.
- To round to the nearest multiple, use the MROUND function.
- To round
*down*to the nearest specified*place*, use the ROUNDDOWN function. - To round
*down*to the nearest specified*multiple*, use the FLOOR function. - To round
*up*to the nearest specified*place*, use the ROUNDUP function. - To round
*up*to the nearest specified*multiple*, use the CEILING function. - To round
*down*and return an integer only, use the INT function. - To truncate decimal places, use the TRUNC function.

### 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.

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