DATEDIF. date. To get a whole number only (not rounded), you can use the INT function like this: = INT ( YEARFRAC (A1,B1)) // whole number only, discard decimal. Date. 25, because February 1 is 25% of the way through 2016. To calculate a date that is 30 weekdays from today, excluding weekends, use the formula in the image below:. =INT(YEARFRAC(birth date,TODAY(), 1)) Okay, enough technical talk, let’s try the formula with some real data 💪. (Kindly note that the date format used is DD/MM/YYYY) Start date = 01/01/2017. Must be. Inserting YEARFRAC Function Now we’re going to use the YEARFRAC function to work with the previous dataset. Restituisce il numero di anni, sotto forma di numero intero o frazione, tra due date utilizzando la convenzione per il calcolo dei giorni specificata. Here are some other simple formulas you can calculate an individual's age using Excel: =9YEAR (NOW))-YEAR (A3)): This formula calculates the age of an individual using today's date and the birthday in a certain cell, specifically the A3 cell. 2020 – 1975 = 45. Syntax. 997268 (0 year + 365/366 years) So, in summary, the output (in DECIMAL (7,6)) from the above two examples would be: 1. - Excel displays dates differently than it stores dates. In our example, it is A2. Simple and effective. {. By the end of this module, you will be an expert in Date and Text functions. 10. For example, the function returns '4 months' between the dates 30/9/18 and 28/2/19 (even though the 28th is the last day of the month). , 01/31/2017. If you want to treat the current year differently, =YEARFRAC(StartDate,DATE(YEAR(RetirementDate),1,1),3) +A difference in complete months, Ignoring days and years. Let us now see how to use this function to calculate age in years, months, and days. Use the YEARFRAC worksheet function to identify the proportion of. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket. ="Available vacation days: "&YEARFRAC(A2;TODAY())*12*(25/12) I calculate the fraction of the year based on the first date and todays date, multiply it by 12 to get months and multiply it again by the total amount of vacation days in my contract per month. 2020) and. YEARFRAC() – It takes the start date and the end date and gives you the number of years that have passed between the two dates. You are going to discover a whole range of skills and techniques that will become a standard component of your everyday use of Excel. Learn how to use special date functions: TODAY, NOW, YEARFRAC, and DATEDIF. From the screenshot below, you can see there is a time difference between the two of them. Here’s how to calculate age in Excel using the “ YEARFRAC ” fraction: In a cell, type in the “ equals ” (=) sign and “ INT ” function. Step 3: Unit. The World Clock – Current time all over the world. Calendar Generator – Create a calendar for any year. The Gregorian calendar is the most prevalently used calendar today. finmath. Use rounddown, roundup, concatenate and isblank to clean up your data. LinkBack. Instead you can change the basis: Here is the impact of changing the basis: YEARFRAC in Google Sheets. YEARFRAC (start_date, end_date, basis. The DAX Date function syntax is: DATE(year. = YEARFRAC("Jan 1 2007","Mar 1 2007") Use four-digit years whenever possible, to avoid getting unexpected results. We can type the following formula into cell C2 to do so: =INT (YEARFRAC (A2,B2)) We can then click and drag this formula down to each remaining cell in column C: Column C displays the. month or (today. Difference in Years = 2020 - 1985 = 35 years. 14. Using DATEDIF Function to Subtract Dates in Excel to Get Years. (includes using blank date values)” Chelsey says:We would like to show you a description here but the site won’t allow us. Basis - use basis 1 that tells Excel to divide the actual number of days per month by the actual number of days per year. NET_WORKDAYS (), COUNT_DAYS () - Return number of days between 2 dates factoring in working days and holidays. Syntax. A few simple date calculations and a reference date parameter would allow users to look at multiple date totals. Weekday Calculator – What Day is this Date? Birthday Calculator – Find when you are 1 billion seconds old. Applying the YEARFRAC Function. =YEAR (NOW ())-1978: This formula calculates the age of an. The Date. year if today. You can use this versatile calculator to calculate the number of. The YEARFRAC function returns the year fraction representing the number of whole days between start_date and end_date on the basis of whole_days. Chapter 7. Learn how to use special date functions: TODAY, NOW, YEARFRAC, and DATEDIF. Instant Connection to an Expert through our Excelchat Service:Here, at first, the YEARFRAC function calculates the number of years in decimal format between two dates. Calculate the time with the SECOND, MINUTE, HOUR, and TIME functions in Excel. We will take the end_date as today’s date, so use the Today() function and the basic is ‘1’ ]. Calendar Generator – Create a calendar for any year. Learn how to use special date functions: TODAY, NOW, YEARFRAC, and DATEDIF. (See the last section in YEARFRAC. The Date Calculator adds or subtracts days, weeks, months and years from a given date. You can calculate the fraction of the year difference between two dates using YEARFRAC function. Explanation. How can we calculate the difference of the date in Alteryx. Replace "start_date" and "end_date" with the cell references of your actual dates. it's 366 days now, crosses over a leap day, but we're starting and ending on the same date in subsequent years, so 1 makes sense. Any time element is ignored. This function is useful in formulas where you need to calculate an age. Date Calculations NOW TODAY YEARFRAC . how to add dates in excel automatically. To calculate a person’s age in Excel, along with their date of birth, you will also have to enter the current (today’s) date. It needs to start with a letter. The YEARFRAC function uses either t. Search: Today's Posts: Home: Search: Today's Posts: ExcelBanter » Excel Newsgroups » Excel Worksheet Functions > Date. Calculates the number of days, months, or years between two dates. You can obviously store the DOB in any cell you want. The “start_date” parameter is a scalar date or time value, in the same way as the “end_date” parameter. 2. __/LINKS\\_ Facebook: Twit. I am familiar with the YEARFRAC function to calculate. The =YEARFRAC ("1/1/2017","12/31/2017") is what is less intuitive. It creates it using the year in cell E17, and the month in cell E17. To calculate a decimal number that represents the number of months between two dates, you can use the YEARFRAC function like this: =YEARFRAC(start,end)*12 YEARFRAC returns fractional years between two dates, so the result is an approximate number of months between two dates, including fractional months returned as a decimal value. The YEARFRAC function has the start date and end date to calculate the number of days as a fraction and it returns 0. FunctionCall = Xls_YEARFRAC(Start_date, End_date, Basis) in: FunctionCall ", Result = " 0. The World Clock – Current time all over the world. This is the date used to calculate the remaining years in. 2 Utilize ROUND Function. -- YEAFRAC returns the delta as a fraction (in years) EVALUATE. In the End_Date field box, enter the day, month, and. End date = 31/12/2017. Excel interprets the year argument according to the date system your computer is using. Type ,TODAY (),”MD”) & ” Days” and press Enter. The steps to use the YEARFRAC function are as follows: Open the YEARFRAC function. Today 2 = TODAY() Let me compare both NOW() and TODAY(). 37 years. 25 =YEARFRAC (A4,B4) Result: 0. Formula for this unit is =DATEDIF (start_date, end_date,”ym”) So the given example shows the answer 6, as the difference between month # 7 and month # 1. Follow the steps to calculate the age using YEARFRAC():. 5290896646133YEARFRAC(start_date, end_date, [basis]) The YEARFRAC function syntax has the following arguments: Start_date Required. 16944 years) =YEARFRAC(B2, C2) Formula 3: Calculate Years of Service in Years as Whole Number (e. You’ll add the birth date to cell A1 and paste the formula into B1 for the result. Current Time - Returns the current date/date-time based on your locale. 005479 0. Part 3. 3333. The Excel Date & Time functions I’m covering here—EDATE, YEARFRAC, EOMONTH, and NETWORKDAYS. Let us begin by getting a closer look at these methods. Birth Date: 03/03/1960. Use the DATEDIF function. Click in the cell where you want the number of years of service to appear. Combine YEAR and MONTH Functions to Get Month-Difference Between Two Dates in Excel. The date in cell C4 is the end_date, and the optional basis is 1, which agency the actual days in the months and the actual days in the years. 5. Rather than display the answer as a decimal, I require to show. Using the YEARFRAC Formula to Calculate Months Between Dates. CREATE FUNCTION YEARFRAC( start_date IN DATE, end_date IN DATE ) RETURN. The third argument “YM” specifies the information to be extracted i. Returns the serial number of a particular date. Formula 2: Calculate Years of Service in Years as Decimal (e. Click on cell E2 in the worksheet to enter the cell reference. 46. Also I know that my solution will have to wait for the entire day of birth to get over in any calendar year to give the right answer. The basic formula for using this function is: =YEARFRAC (start_date, end_date, basis) Start_date is the first variable date, end_date is the second variable date, and basis is the assumption under which Excel should return the result of the calculation. Also I know that my solution will have to wait for the entire day of birth to get over in any calendar year to give the right answer. This means show the last. After adding the formula, press the Enter button to see the result. Other quick formulas to calculate age. This would be the second argument you would be entering. This method of calculating age is beneficial in order to quickly subtract a date from another date. 25, because February 1 is 25% of the way through 2016. Let’s apply the TODAY function in cell “D8”. This video show how t. However, we generally. Then enter the following formula into a blank cell: =AgelnNow (A2) ( A2 is the birth date cell) Then drag the fill handle down to the cells that you want to get the age, all ages from the birth date to today have been calculated, see screenshot: Tip: If you need to get the age from birth date to death date instead of current date, please. 997268. Here we will use the seq() function to get the result. The DATE function returns the sequential serial number that represents a particular date. This can be useful for creating valid date values for use in the YEARFRAC formula. Excel date calculations (now, today, yearfrac). Subtract Option: Date entered is your Finish Date. Select the C2 cell and move the Fill Handle over the cells where you want to implement this formula. It will work in any VBA Application: Option Explicit Public Function YearFracActual(ByVal aDate1 As Date, ByVal aDate2 As Date) As Double Dim lowerDate As Date Dim upperDate As Date Dim year1 As Integer Dim year2 As Integer 'Get dates in order If aDate1 > aDate2 Then lowerDate = aDate2 upperDate = aDate1 Else lowerDate = aDate1 upperDate = aDate2 End. N: Returns the argument provided as a number. Hit Enter, and you. Therefore, dates entered in this format are not recognized as dates and result in erroneous calculations. xlsx. Click the cell containing the start date, then type a comma. YEARFRAC function in Excel. Click on the Basis line. Learn how to use special date functions: TODAY, NOW, YEARFRAC, and DATEDIF. I am familiar with the YEARFRAC function to calculate the period between two dates. 오늘 날짜를 구해주는 today, 지금의 날짜와 시간을 구해주는 now, 요일이 뭔지 알려주는 weekday, 몇 번째 주인지 알려주는 weeknum, 그리고 기간이 1년중 차지하는 비율을 알려주는 yearfrac에 대해 알아보겠습니다. YEARFRAC(StartDate; EndDate; Basis). month or (today. C2 W2 Assessment Workbook. Below is the formula that will do this: =DATEDIF (B2,C2,"y")&" Years "&DATEDIF (B2,C2,"ym")&" Months". [SOLVED] Date Calculations; Results 1 to 4 of 4 Date Calculations. While completing the typing of the formula in Formula Bar, press Enter on your keyboard and you will get the due date, and the due date of the project named Alpha is June 4, 2018. For example I might say that I would expect the result to be 1 if B3 contains today's date (8-Jul-2011) and B4 contains the date exactly 1 year hence - 8-Jul-2012 but your formula gives a result of 1. This function will return with the decimal value which is the fraction of a year between the two periods. end_date – The end date to consider in the. The function I’m presenting here has the same function arguments than its Excel-equivalent. Returns the seconds part of a user-supplied time. In J4 calculate the number of days since the last order, copy the formula down to J35. 99726 is actually the correct and expected result here. Find the number of days between the current date and a due date to see how many days overdue something is. In Date_1 and Date_2 have three years difference in year. 2. Excel uses this “30/360” as the default method of calculating the number of years. The value of the year argument can include one to four digits. Based on the Excel spreadsheet above, the following YEARFRAC examples would return: =YEARFRAC (A2,B2) Result: 0. An implementation of the ACT/360 can be found at svn. The formula will look like this: = WEEKDAY ( A2 ,2) In cell F2 create a formula that calculates the week number of the date in A2. Let’s see how you can do it. __/LINKS\_ Facebook: Twit. . Here we will use the seq() function to get the result. Then,. Both can deal with business days and holidays. After putting the data of the current year (your end date) and the person’s birthdate (your start date), Microsoft Excel will give you the answer of 45. In this case, choose MY (Month/Year) as seen below. Dividing 17807 with 365 results in the number of years, 48. Formula 2: Calculate Years of Service in Years as Decimal (e. The main function to calculate dates in Excel: DATE function Get current date and time: TODAY - returns today's date NOW - returns the current date and time. 25) Where: birthdate is the cell containing the date of birth; today is the current date, which you can get using the TODAY() functionThe optional third argument in Excel completely changes how the calculation is done so if you need to support all the possible arguments, that makes the problem much larger. Learn how to use special date functions: TODAY, NOW, YEARFRAC, and DATEDIF. Once you enter your dates, you can calculate the age in years and months. 647058824 should appear in cell E3 which is the length of time in years. Test your Skills: Text and Date Functions • 30 minutes; Combining Text (CONCAT, &) • 30 minutes; Changing Text Case (UPPER, LOWER, PROPER) • 30 minutes; Extracting Text (LEFT, MID, RIGHT) • 30 minutes; Finding Text (FIND) • 30 minutes; Date Calculations (NOW, TODAY, YEARFRAC) • 30 minutes Test your Skills: Text and Date Functions • 30 minutes; Combining Text (CONCAT, &) • 30 minutes; Changing Text Case (UPPER, LOWER, PROPER) • 30 minutes; Extracting Text (LEFT, MID, RIGHT) • 30 minutes; Finding Text (FIND) • 30 minutes; Date Calculations (NOW, TODAY, YEARFRAC) • 30 minutes We would like to show you a description here but the site won’t allow us. We would like to show you a description here but the site won’t allow us. In Date_1 and Date_2 have three years difference in year. today(). DATEVALUE function. how about from Mar 1, 2020 to Mar 1, 2021? Still exactly 365 days and same date one year later, yearfrac agrees the answer is 1. To round the decimal number or fractional value to nearest whole number we can wrap the above formula in the. Here’s how: 1. Go to cell A3. By default, Excel uses the US 30/360 basis, where a year is 360 days long and each month has 30 days. That formula will look like this: = WEEKNUM ( A2 ,2) Finally, we’ll calculate the year of the date in cell G2. Pages 1 This preview shows page 1 out of 1 page. Count Days Add Days Workdays Add Workdays Weekday Week № Start Date Month: / Day: / Year: Date: Today Add/Subtract: Years: Months: Weeks: Days: Include the time Include only certain weekdays Repeat: Calculate times Date Calculations (NOW, TODAY, YEARFRAC) Excel Skills for Business: Intermediate I Week 2 Practice Video: Date Calculations (NOW, TODAY, YEARFRAC) Taking Charge of Excel: Test your skills, Part 1. How the formula works. The Excel DAYS function. The difference between 1st March 2011 and 29th February 2012 is 0. today() years = today. Click the cell containing the end. True. Enter 10 dates in cells A4 through A13. Learn how to use special date functions: TODAY, NOW, YEARFRAC, and DATEDIF. However, if you prefer to use the actual number of days in each year, enter “1” for the optional third parameter. Enter the below formula on your Sheet and check the output. Days Calculator: Days Between Two Dates How many days, months, and years are there between two dates? Count Days Add Days Workdays Add Workdays Weekday Week №. I use YEARFRAC to calculate the fraction of a year represented by a given date. SELECT. Converts a date in the form of text to a serial number. For example, the number of days between 2008-01-01 and 2009-01-01 is 366 (a leap year); the year between those dates has 360 days. 3. . Step 2: Now Select the cell where you want the age of the person. Initially, the result we would get using these functions would be 59. After pressing Enter, the function will return 84722222. Next, refer to cell B1 where you have the ending date. The final part of the syntax is used to calculate the type of information you want to be. Initially, the result we would get using these functions would be 59. Here’s how to factor leap year into your fiscal period calculations: Determine the starting date of your fiscal period. Uploaded By SuperAlligator1795. End_date - TODAY() function to return the today's date. This is an example of nesting. To use the YEARFRAC Function with Basis, you now follow the steps which have given below: Step 1: First, select Cell F5. This does not matter if date1 and date2 are in the same year, but it does matter if date1 is a leap year (e. We used the actual/actual year convention setting of 1 in examples 2 and 3 because it counts the actual days. For Individuals For Businesses For Universities For Governments. Date. This. The NETWORKDAYS function has the following syntax: 1 =NETWORKDAYS (old_date,. The method to use this function is as follows =TODAY (). =YEARFRAC(DATE(2021, 1, 1), DATE(2021, 12, 31)). Year calculator result for two dates 20 years apart. This document sets out the estimated. To use the YEARFRAC Function with Basis, you now follow the steps which have given below: Step 1: First, select Cell F5. One way to find the date difference in Excel is by using arithmetic operations. date(1980, 10, 10) def age(): today = datetime. Using relativedelta I can get the number of years, number of months and number of days between the dates, but not the fraction of years, and I can also subtract the dates to get. Double click on the selected cell, and type this formula: =DATEDIF (cell_name, TODAY (), "Y") cell_name is the cell that contains the date of birth. In J4 calculate the number of days since the last order, copy the formula down to J35. For instance. =YEARFRAC( start_date, end_date) * 12. NOW Function; SECOND Function; TIME Function; TIMEVALUE Function; TODAY Function; WEEKDAY Function;. Method 1: Using the seq() function. Using these functions, you can easily calculate the years between two dates in Excel, simplifying date-related calculations. NOW, SECOND, TIME, TIMEVALUE, TODAY, WEEKDAY, WEEKNUM, WORKDAY, WORKDAY. datediff(yy,'31 Dec 2013','1 Jan 2014') returns 1. Esempio di utilizzo YEARFRAC(DATE(1969;7;16);In the Calculations group of the Modelling tab, click on New Column. 5. Date Calculator – Add or subtract days, months, years. Press Enter, and the result will be the fractional number of years between the two dates. It obtains this information on the current date by reading the computer's clock. The Excel DAYS function. Keep the formula result selected, and press Ctrl + 1 to display the Format Cells dialog, then under Number tab, click Date from. g. pdf - School Peruvian University of Applied Sciences; Course Title ADM Y NNII 123; Type. Simple, just like when using the DATEDIF. 2. However, if you want the number of complete months in these time periods, you could use the formula below. The YEARFRAC function is categorized as a Date and Time function in Excel. From this unit, we can identify the difference in months between a start date and an end date, irrespective of the days and years. The output is shown below. ie add up the values in the Bank Expenses column of all those entries dated between between 1st and 30th April. Now type the function in the Formula Bar and the function will be: =YEARFRAC (C5,D5,E5) Step 2: Now press the Enter button from your keyboard. We would like to show you a description here but the site won’t allow us. The first one is used to calculate the total number of completed years. Returns the serial number of a particular date. @WoodDesign. A third method to calculate age in Excel is to use the following formula: =INT((today – birthdate) / 365. To calculate the age of each employee till date, the end_date is set as the date today. In the Formulas and List section, select Calculation. Public Function FIsLeapYear (Year As Integer) As Boolean If (Year Mod 4) > 0 Then FIsLeapYear = False ElseIf (Year Mod 100) > 0 Then FIsLeapYear = True ElseIf (Year Mod 400) = 0 Then FIsLeapYear = True Else. Then, to add 7 days to today’s date, we can use the formula =TODAY ()+7, which returns the result as 17-10-2020. - For example, 9/1/2021 is stored as 44440 and 10/1/2021 as 444470. This module discusses ways you can extract information and. Excel YEARFRAC Function Examples. If you have a DOB of 01/03/2000 and a trial date of 29/2/24, your calculation gives an. YEARFRAC can. Note: At the time of this writing, the current date is September 2, 2021. I found an e-mail thread from actual Office developers providing a VBA implementation of the YEARFRAC algorithm. Other quick formulas to calculate age. Formula returns 0. Calculates the number of days, months, or years between two dates. The specified date is January 28, 2021. This method involves subtracting one date from another to calculate the difference in days. For example, the formula =DAYS360("1-Jan-2021","31-Dec-2021") returns 360 days. Our start-date is B4, the hire date. Test your Skills: Text and Date Functions • 30 minutes; Combining Text (CONCAT, &) • 30 minutes; Changing Text Case (UPPER, LOWER, PROPER) • 30 minutes; Extracting. Countdown to Any Date – Create your own countdown. You can use YEARFRAC to do things like calculate age with a birthdate. In the above example, we have the 1st March 2021 as the start date and 23 Feb 2022 as the end date. Tip: You're most likely to use basis 1, unless your business uses a specific system. =DAYS (TODAY (), Due_Date) Find the number of workdays (Monday through Friday) remaining before a project completion date, not including a column of specified holidays/nonworking days. By the end of this module, you will be an expert in Date and Text functions. To return the percent of year completed based on the current year and current date, you can adjust the formula to use the TODAY function like this: = YEARFRAC ( DATE ( YEAR ( TODAY ()),1,1), TODAY ()) In this version, the TODAY function returns the current date which goes into YEARFRAC twice – once as the start date, and once as as the end date. In the When Calculating Workbooks section, select or clear the Use 1904 date system checkbox. DAY function. g. The start date is provided by cell C4. Cool. 2. The number of years between two dates, start_date and end_date is calculated as follows: =YEARFRAC ( start_date, end_date ) The following spreadsheet shows the Excel Yearfrac function, used to calculate the age, on 01/01/2017, of an individual who was born on 03/03/1960: A. If the data source is a live connection, the system date and time could be in another timezone. Note: DATEDIF function will exclude the start date when counting the month numbers. After selecting cell E5, type the formula in Formula Bar. Date. Unfortunately, the naive approach with the DATEDIFF() function doesn't quite cut it here - using DATEDIFF('year', birthday, current_date) nets the difference between the current year and the birthday year, which. Considering the above, an Excel formula to calculate age from date of birth is as follows: YEARFRAC(date of birth, TODAY(), 1)Calculate Age from Birthdates in Years Only in Google Sheets. Method 1: Using the seq() function. DayOfYear. 73 where 11 is the number of months and . calculation: A calculation that employs names and values that have been assigned. 3 in the first instance of our example. Returns the minute part of a user-supplied time. Non-Array Formulas: Cell A1 contains 31/12/2000. 4. Now the formula returns 3. The two arguments of the DAYS function can be actual dates, cell references, or another date and time function—such as the TODAY function. Solution: Make sure that your system’s date and time settings (both Short time and Long time) matches the date format in the date_text argument. This represents approximately a quarter of a year beyond. Required Editions Available in: both Salesforce Classic an. ) WEEK( date <, 'descriptor'>) returns the week of year from a SAS date value. The steps to evaluate the age using the YEARFRAC in Excel are, Step 1: Select cell C2, enter the formula =YEARFRAC (B2,TODAY ()), and press the “ Enter ” key. TODAY. DATEDIFF: Returns the number of units (unit specified in Interval) between the input two dates. sql. 5 Methods of getting the number of months between two dates: Use the YEAR and MONTH function. * If "basis" = 1 (Actual/Actual), the. The two dates make the start date and the end date. Extracting The. Learn how to use special date functions: TODAY, NOW, YEARFRAC, and DATEDIF. how to use special date functions: TODAY, NOW, YEARFRAC, and DATEDIF. Use Microsoft VBA code. 005,0. For example, if you start a project on 01 Jan and it ends on 31 Jan, the DATEDIF function. Here's how it does this: First the DATE function creates the date, 5/1/2016. Learn how to use special date functions: TODAY, NOW, YEARFRAC, and DATEDIF. 49167 in cell D3. 3. HOUR. Learn how to use special date functions: TODAY, NOW, YEARFRAC, and DATEDIF. Then I’ll show a sample of the. there is a function DATETIMEDIFF to calculate the difference between two dates. 5 =YEARFRAC (A5,B5) Result: 1. Or perhaps this is days since last incident or violation. Dates in Excel. In practice, it feels safer to use YEARFRAC and TRUC, but, it’s cool knowing our options. Then enter the following formula into a blank cell: =AgelnNow (A2) ( A2 is the birth date cell) Then drag the fill handle down to the cells that you want to get the age, all ages from the birth date to today have been calculated, see screenshot: Tip: If you need to get the age from birth date to death date instead of current date, please. Basis – the month’s actual days are divided by the year’s actual days used when you utilize 1 as. 3. In row 7 we use the YEARFRAC function to calculate a more accurate result. In the dialog box that appears, click UPGRADE. True. The World Clock – Current time all over the world. Date Calculations (NOW, TODAY, YEARFRAC) Excel Skills for Business: Intermediate I Week 2 Practice Video: Date Calculations (NOW, TODAY, YEARFRAC)The Excel YEARFRAC function formula is as follows. I'm not sure why it is using 1900 for the year. Type the formula in C2. The above formula contains two DATEDIF functions. The method to calculate the YEARFRAC depends on the convention.