The DATEDIF function can calculate the difference between dates in days in three different ways: 1 total days, 2 days ignoring years, and 3 days ignoring months and years. The screenshot below shows all three methods, with a start date of June 15, , and an end date of September 15, Note that because Excel dates are just large serial numbers , the first formula does not need DATEDIF and could be written as simply the end date minus the start date:.
The DATEDIF function can calculate the difference between dates in months in two different ways: 1 total complete months, 2 complete months ignoring years. The screenshot below shows both methods, with a start date of June 15, , and an end date of September 15, Notice in row 6 the difference is almost 6 years, but not quite.
With a full birth date in A1, the formula is:. The Excel DAYS function returns the number of days between two dates based on a day year, where all months are assumed to have 30 days.
Skip to main content. Get days, months, or years between two dates. Return value. A number representing time between two dates. Excel Usage notes. Unit Result "y" Difference in complete years "m" Difference in complete months "d" Difference in days "md" Difference in days, ignoring months and years "ym" Difference in months, ignoring years "yd" Difference in days, ignoring years Example 1 - Basic usage In the example shown above, column B contains the date January 1, and column C contains the date March 1, As you see, this formula also returns an error in row 6 where end date is less than the start date.
If your data set may contain such dates, you will find the solution in the next examples. But unlike the DATEDIF function, it can compare any two dates and return the difference in months as either a positive or negative value:. In case all of your dates are of the same year, or you want to calculate months between the dates ignoring years, you can the MONTH function to retrieve the month from each date, and then subtract one month from the other:.
If you followed the previous examples where we calculated months and days between two dates, then you can easily derive a formula to calculate years in Excel. The following examples can help you check if you got the formula right :. This is because the number of full calendar years between the start and end dates equals to zero. And I believe you are not surprised to see the NUM! Similarly to the MONTH formula , you extract the year from each date, and then subtract the years from each other:.
To count the number of complete years, months and days between two dates in a single formula, you simply concatenate three DATEDIF functions:.
The formula displays only non-zero elements as demonstrated in the following screenshot:. In fact, calculating someone's age based on the date of birth is a special case of calculating date difference in Excel, where the end date is today's date.
The above formula calculates the number of complete years. If you'd rather get the exact age, including years, months and days, then concatenate three DATEDIF functions like we did in the previous example:. And you will get the following result:. To learn other methods of converting a birthdate to age, check out How to calculate age from date of birth.
However, there is one significant drawback - it is undocumented by Microsoft, meaning, you won't find DATEDIF in the list of functions nor will you see any argument tooltips when you start typing a formula in a cell. Use ampersands, quotes, and text. This makes it easier to read.
You can download an example workbook with all of the examples in this article. You can follow along, or create your own formulas. Download date calculation examples.
Keep in mind this will change when the file is opened again on a future day. INTL function when you want to calculate the number of workdays between two dates. You can also have it exclude weekends and holidays too. Before you begin: Decide if you want to exclude holiday dates. If you do, type a list of holiday dates in a separate area or sheet. Put each holiday date in its own cell. Name the range MyHolidays , and click OK. Then create the formula using the steps below. Type a formula like the above example.
The 1 in the formula establishes Saturdays and Sundays as weekend days, and excludes them from the total. INTL function. If Saturday and Sunday are not your weekend days, then change the 1 to another number from the IntelliSense list. For example, 2 establishes Sundays and Mondays as weekend days. If you are using Excel , skip this step. If you don't have holidays, you can leave the comma and MyHolidays out.
Or, you could type each holiday inside the formula. You can calculate elapsed time by subtracting one time from another. First put a start time in a cell, and an end time in another. Make sure to type a full time, including the hour, minutes, and a space before the AM or PM. In this example, the start time is in cell D80 and the end time is in E Make sure to type the hour, minute, and a space before the AM or PM.
To calculate the time between two dates and times, you can simply subtract one from the other. However, you must apply formatting to each cell to ensure that Excel returns the result you want. Each cell should have a month, day, year, hour, minute, and a space before the AM or PM. This isn't the date you'll set, it's just a sample of how the format will look. The result will probably look like a number and decimal.
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