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Excel YEARFRAC function

doc workday.intl function 1

If you want to follow along with this tutorial, please download the example spreadsheet.
doc sample

Description

The YEAR function is used to calculate the fractional year in a decimal format between given dates.

Syntax and arguments

Formula syntax

YEARFRAC(start_date, end_date, [basis])

doc yearfrac function 2

Arguments

  • Start_date: Required. The start date that is used to calculate the fractional year, it cannot be a text.
  • End_date: Required. The end date that is used to calculate the fractional year, it cannot be a text.
  • Basis: Optional. The basis determines how to calculate the fractional year. If it is omitted, it is 0.

 Basis Day count basis 
 0 or omitted  30/360 (USA convention)
 1  Actual/Actual
 2 Actual/360 
 3 Actual/365 
 4 30/360 (European convention)  

Return Value

The YEAR function returns a decimal number.

Remarks

1. When using the US (NASD) 30/360 basis, and the start_date is the last day in February, the YEARFRAC function may return an incorrect result.

2. All arguments will be truncated to integer.

Errors

1. #VALUE! error appears when the argument start_date or end_date are invalid dates.

2. #NUM! error appears when the basis is out of range 0-4.

Usage and Examples

Example 1 Basic usage

To get the fractional year based on the start date in cell B3 and end date in cell C3, please use below formula:

=YEARFRAC(B3,C3)

doc yearfrac function 3

Press Enter key to get the result.
doc yearfrac function 4

In this example, the [basis] are omitted, you can use the type of basis as you need.

Example 2 Combine DATE function

Sometimes, you may want to directly type the dates as the argument start_date and end_date in the formula. For preventing errors, you can use the DATE function in the formula.

For instance, the start date is 12/1/2019, the end date is 1/3/2020, please use below formula:

=YEARFRAC(DATE(2019,1,12),DATE(2020,3,1))

doc yearfrac function 5

Press Enter key to get the result.
doc yearfrac function 6

In this example, the [basis] are omitted, you can use the type of basis as you need.


Relative Functions:

  • Excel YEAR Function
    The YEAR function returns the year based on the given date in a 4-digit serial number format.

  • Excel DAYS360 Function
    DAYS360 function can help you to return the number of days between two dates based on a 360-day year, which is considered to have 30 days in each month.

  • Excel WEEKNUM Function
    The WEEKNUM in Excel returns the week number of the given date in a year, which starts counting weeks from January 1.

  • Excel WORKDAY;Function
    The WORKDAY is used to add a specified number of workdays to a started date and returns the future or past date in a serial number format.


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