FLOOR Function in Excel: Round Down to a Multiple (Classic)

FLOOR Function in Excel: Round Down to a Multiple (Classic) featured illustration

📎 This article includes 1 downloadable practice file ↓

⏱ 2 min readUpdated 28 September 2026

MathLevel: IntermediateAvailable in: Excel 2007+

In this article
  1. Syntax
  2. Examples
  3. Example 1
  4. FLOOR in practice
  5. Where you will use it
  6. Worked example
  7. Mistakes people make
  8. Related functions
  9. Continue learning

FLOOR rounds down to a multiple — full boxes you can ship, 15-minute billing blocks.

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Syntax

=FLOOR(number, significance)
Argument What it means
significance The multiple.

Examples

Example 1

=FLOOR(A2, TIME(0,15,0))

Round a clock-in time down to the quarter hour.

FLOOR in practice

Where you will use it

  • Round down to price points
  • Full packs you can make from stock
  • Round time down to 15-minute slots

Worked example

ValueStepFormulaResult
48710=FLOOR(A2,B2)480
236=FLOOR(A3,B3)18
9.90.5=FLOOR(A4,B4)9.5

Results calculated in Excel.

Mistakes people make

MistakeWhat to do instead
Negative numbers with positive stepUse FLOOR.MATH
Confusing with ROUNDDOWNFLOOR uses multiples, not digits

FLOOR.MATH · CEILING · INT

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📎 Practice files for this article

  • 📗
    Practice workbook: Math & rounding24 tasks on realistic sales data — type your formula, the Check column turns green when it is right. Answers sheet included.
    ⬇ XLSX · 35 KB

Free to use for learning. Files with macros (.bas) are plain text — import them with Alt+F11 → File → Import File, and always test on a copy.

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