How to use Excel ROUNDDOWN function

Introduction

ROUNDDOWN function in excel is a Math/Trig function. It is a worksheet function. It rounds down the given function to a defined number of decimal places. For example, number 1.5 is rounded down to 0 decimal places by formula =ROUNDDOWN(1.5,0) which gives 1 as the result. ROUNDDOWN function is same as MROUND function except it always rounds down.  

Syntax

=ROUNDDOWN(Number, Num_Digits)

Arguments

  • Number- The number or cell containing the number that is to be rounded off.
  • Num_Digits- It is the number of digits to which you can round down the number.

Keynotes

  • If the provided number is a multiple of significance argument, it is not rounded down.
  • ROUNDDOWN function is same as MROUND function except it always rounds down.  
  • If argument is non numeric, #VALUE! error is displayed.
  • If sign of significance argument and number is opposite, #NUM! error is displayed.
  • It always rounds down the numbers from 1-9.
  • If num_digits is equal to zero than the number is rounded down to the nearest integer.
  • If num_digits is less than zero than the number is rounded to the left of defined decimal places.
  • If num_digits is greater than zero than the number is rounded to the right of defined decimal places.

Examples

In the following example, a table of numbers is given, it is rounded down using ROUNDDOWN function.

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