ROUNDDOWN Function in Excel: Always Round Towards Zero

⏱ 1 min readUpdated 28 September 2026

MathLevel: BeginnerAvailable in: Excel 2007+

In this article
  1. Syntax
  2. Examples
  3. Example 1
  4. Example 2
  5. Related functions

ROUNDDOWN removes digits without rounding up — for example to calculate completed years or whole units.

Syntax

=ROUNDDOWN(number, num_digits)
Argument What it means
num_digits Digits to keep.

Examples

Example 1

=ROUNDDOWN(B2/1000, 0)*1000

Round an amount down to the thousand.

Example 2

=ROUNDDOWN(YEARFRAC(A2, TODAY()), 0)

Completed years of service.

ROUNDUP · INT · TRUNC

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