What is ROUNDDOWN function in Excel?
The ROUNDDOWN function is one of the math functions of Excel.
It Rounds a number down, toward zero.
We can find this function in Math &trig category of insert function Tab.
How to use ROUNDDOWN function in excel
- Click on an empty cell (like F5 )

2. Click on the fx icon (or press shift+F3)

3. In the insert function tab you will see all functions

4. Select math and trig category
5. Select ROUNDDOWN function
6. Then select ok

7. In the function arguments Tab you will see ROUNDDOWN function
8. Number is any real number that you want to be rounded down
9. Num_digits is the number of digits to which you want to round. Negative rounds to the left
of the decimal point; zero or omitted, to the nearest integer
10. You will see results in the formula result section

Examples of ROUNDDOWN function in Excel
Example 1:
How to use ROUNDDOWN function in excel
You can see examples of ROUNDDOWN function below:

rounddown(A2,B2) ----->>>>answer is 123.4
rounddown(A3,B3) ----->>>>answer is 123.45
rounddown(A4,B4) ----->>>>answer is 123
rounddown(A5,B5) ----->>>>answer is 120
rounddown(A6,B6) ----->>>>answer is 100
What is the purpose of ROUNDDOWN function?
It Rounds a number down, toward zero.
What is the Return value of ROUNDDOWN function?
It returns a number.
How many arguments does ROUNDDOWN function have?
This function has just 1 Argument.
The argument of ROUNDDOWN function is number.
Number is any real number that you want to be rounded down
Num_digits is the number of digits to which you want to round. Negative rounds to the left
of the decimal point; zero or omitted, to the nearest integer
The argument of ROUNDDOWN function is required and not optional.
ROUNDDOWN(number) = number
Which version of excel supports ROUNDDOWN function?
This function is available for all excel versions (2003-2019)
Errors in ROUNDDOWN function
ROUNDDOWN related functions :
- ROUND function
- ROUNDUP function
- CEILING function
- FLOOR function
- MROUND function
- INT function
- TRUNC function