Function: ROUNDDOWN

by | Jan 11, 2019 | Excel Formulas

ROUNDDOWN Function

The ROUNDDOWN function rounds down a number to a specified number of digits. In this guide, we’re going to show you how to use the ROUNDDOWN function and also throw in some tips and error handling methods.

Supported versions

  • All versions

Syntax

ROUNDDOWN(number,[num_digits])

Arguments

number The number to be rounded.
[num_digits] The number of digits.


Examples

Firstly a reminder: Named ranges are added to ease of reading formulas.

Example 1

=ROUNDDOWN(314.159265358979,2)
formula returns 314.16; because when num_digits is greater than 0, then number is rounded down to the specified number of decimal places.

ROUNDDOWN Function

Example 2

=ROUNDDOWN(314.159265358979,0)
formula returns 315; because when num_digits is equal to 0, then number is rounded down to the nearest integer.

Example 3

=ROUNDDOWN(314.159265358979,-2)
formula returns 400; because when num_digits is less than 0, the number is rounded down to the left of the decimal point.

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Tips

  • Unlike generic rounding the ROUNDDOWN function rounds all numbers 1 to 9 down.
  • Use the ROUND for standard rounding.
  • Use the ROUNDUP to always round up.