The Excel FLOOR function is a valuable mathematical function that enables users to round numbers down to the nearest multiple of a specified value. This can be particularly useful in financial modeling, budgeting, or any scenario where precise rounding control is necessary.

Syntax

FLOOR(number, significance)

• number: The numeric value you wish to round down.
• significance: The multiple to which you want to round the number down.

Example #1

=FLOOR(10.75, 0.5)

In this example, the function rounds 10.75 down to the nearest multiple of 0.5, resulting in 10.5.

Example #2

=FLOOR(23, 5)

Here, the function rounds the number 23 down to the nearest multiple of 5, which is 20.

Example #3

=FLOOR(-3.7, 1)

In this case, the function rounds -3.7 down to the nearest multiple of 1, producing a result of -4.

Error handling

• NUM!: This error occurs if the significance argument is zero or negative.
• VALUE!: This error indicates that the number or significance argument is non-numeric.

Conclusion

The FLOOR function in Excel is an essential tool for users needing to perform calculations that require consistent rounding down. By understanding its syntax and behavior, users can effectively integrate this function into their spreadsheets, enhancing their ability to handle numerical data with precision.