Using the TRUNC Function in Microsoft Excel

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The TRUNC function is a mathematical and trigonometric function in Excel. It removes the fractional part of a number and truncates a number into an integer. It was introduced in MS Excel 2007.

In financial analysis, the function can be used to truncate a number to a specific precision. It is also useful for extracting date and time values from data.

Syntax

The syntax of the TRUNC function in Microsoft Excel is as follows

TRUNC( number, [digits] )

Parameters or arguments

• Number
  The number to cut.
• Digits
  Optional. This is the number of decimal places to be displayed in the resulting truncated number. If this parameter is omitted, the TRUNC function takes the value 0.

Returns.

Function TRUNC returns a numeric value.

TRUNC Function Example

Copy the sample data from the following table and paste it into cell A1 of a new Excel spreadsheet. If you want the formulas to display the results, select them, press F2 and then choose Enter. If necessary, you can adjust the width of the columns to display all the data.

Formula

=TRUNC(8.9)
=TRUNC(-8.9)
=TRUNC(0.45)

Description

Truncates 8.9 to return the integer part (8).
Truncates a negative number to return the integer part (-8).
Truncates a number between 0 and 1, returning the integer part (0).

Result

8
-8
0

The TRUNC function does not round a number, but simply truncates it as shown. The function can also be used to return a number of decimal places without rounding with the num_digits argument. For example, =TRUNC(PI(),2) returns the truncated pi value to two decimal places, i.e., 3.14, and =TRUNC(PI(),3) returns the truncated pi value to three decimal places, i.e., 3.141.

Deleting the time of a date-time stamp

A useful example of TRUNC is the deletion of the time from a date and time stamp in Excel.

Imagine that you have the following date/time stamps, but we only want the date in one column for the evaluation.

The following formula can be used to delete the time

=TRUNC(A2)

Although the time is removed, the resulting cells still need to be formatted as a date only.

Conclusion

Analyzing Excel data is difficult enough without having to deal with decimal numbers. Although it is possible to round up or down in Excel, this does not necessarily change the data – it only changes the way it is displayed.

If you want to delete or directly define the number of decimal places in a number, you must use the TRUNC function. Learn how to use the TRUNC function in Excel.

We hope that this tutorial has been helpful in using the TRUNC function in Excel. Cheers!

https://support.office.com/en-us/article/trunc-function-8b86a64c-3127-43db-ba14-aa5ceb292721

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