This article describes the formula syntax and usage of the ROUNDDOWN function (function: A prewritten formula that takes a value or values, performs an operation, and returns a value or values. Use functions to simplify and shorten formulas on a worksheet, especially those that perform lengthy or complex calculations.) in Microsoft Excel.
Rounds a number down, toward zero.
The ROUNDDOWN function syntax has the following arguments (argument: A value that provides information to an action, an event, a method, a property, a function, or a procedure.):
- Number Required. Any real number that you want rounded down.
- Num_digits Required. The number of digits to which you want to round number.
- ROUNDDOWN behaves like ROUND, except that it always rounds a number down.
- If num_digits is greater than 0 (zero), then number is rounded down to the specified number of decimal places.
- If num_digits is 0, then number is rounded down to the nearest integer.
- If num_digits is less than 0, then number is rounded down to the left of the decimal point.
The example may be easier to understand if you copy it to a blank worksheet.
How do I copy an example?
- Select the example in this article. If you are copying the example in Excel Online, copy and paste one cell at a time.
Important: Do not select the row or column headers.
Selecting an example from Help
- Press CTRL+C.
- Create a blank workbook or worksheet.
- In the worksheet, select cell A1, and press CTRL+V. If you are working in Excel Online, repeat copying and pasting for each cell in the example.
Important: For the example to work properly, you must paste it into cell A1 of the worksheet.
- To switch between viewing the results and viewing the formulas that return the results, press CTRL+` (grave accent), or on the Formulas tab, in the Formula Auditing group, click the Show Formulas button.
After you copy the example to a blank worksheet, you can adapt it to suit your needs.
||Rounds 3.2 down to zero decimal places (3)
||Rounds 76.9 down to zero decimal places (76)
||Rounds 3.14159 down to three decimal places (3.141)
||Rounds -3.14159 down to one decimal place (-3.1)
||Rounds 31415.92654 down to 2 decimal places to the left of the decimal (31400)