How to calculate age in Excel from birthday
The tutorial explains the syntax and uses of the Excel DATE function and Convert date to year in Excel & calculate age from date of birth. To get a minimum value based on criteria, you can use the MIN function can use an array formula based on the MIN and TODAY functions to find the next date . So you want to know a person's age or need to calculate how many We can use the TODAY() function in Excel to display the current date in a.
Determine leap and non-leap years - two Date formulas to pin down leap years in Excel. Using Excel DATE formulas in conditional formatting In case you want not only to calculate but also highlight dates in your Excel worksheets, then create conditional formatting rules based on DATE formulas.
Supposing you have a list of dates in column A and you want to shade dates that occurred earlier than 1-May in orange and those that occur after May in green. The DATE formulas you want are as follows: You can find the links to in-depth tutorials at the end of this article.
Ages in Years and Months
The beauty of this tool is that outputs the results as formulas, not values. Thus you have a kind of 'two birds, one stone' opportunity - get the result faster and learn Excel date functions along the way: The wizard can perform the following calculations: Add years, months, weeks, days, hours, minutes and seconds to the specified date. Subtract years, months, weeks, days, hours, minutes and seconds from the specified date.
Calculate the difference between two dates. Get age from the birthdate. For example, here's how you can add 4 different units in cells B3: E3 to the date in A4. Assuming a birthdate is in cell B2, the formula to calculate age in years goes as follows: The formula is obvious and easy-to-remember, however, there is a tiny problem. In most cases, it returns a decimal number as demonstrated in the screenshot below.
Ages in Years and Months (Microsoft Excel)
To display the number of complete years, use the INT function to round a decimal down to the nearest integer: Using this age formula in Excel produces pretty accurate results, but not flawless. Dividing by the average number of days in a year works fine most of the time, but sometimes it gets the age wrong.
For example, if someone was born on February 29 and today is February 28, the formula will make a person one day older. As an alternative, you can divide by However, this approach is not perfect either. For example, if you are calculating the age of a child who hasn't yet lived through a leap year, dividing by Overall, subtracting the birth date from the current date works great in normal life, but is not the ideal approach in Excel. Further on in this tutorial, you will learn a couple of special functions that calculate age faultlessly regardless of the year.
Basis is an optional argument that defines the day count basis to use. Basis - use basis 1 that tells Excel to divide the actual number of days per month by the actual number of days per year.
Minimum value if
Considering the above, an Excel formula to calculate age from date of birth is as follows: Y - returns the number of complete years between the start and end dates.
M - returns the number of complete months between the dates.
D - returns the number of days between the two dates. YM - returns months, ignoring days and years. MD - returns the difference in days, ignoring months and years. YD - returns the difference in days, ignoring years. Since we aim to calculate age in years, we are using the "y" unit: How to get age from birthday in years, months and days As you have just seen, calculating age as the number of full years that the person has lived is easy, but it is not always sufficient.
If you want to know the exact age, i.
To get the number of years: And then, concatenate the above functions in a single formula, like this: F3 down the columns as shown. In Excel spreadsheets, date serial number 1 represents January 1, But in VBA, date serial number 1 represents one day earlier: Lotus can be blamed for this one-day discrepancy, because Lotus didn't handle leap years correctly.
Our calendar adds a 29th day to February in all years evenly divisible by 4, except for those ending in These years receive the extra day only if they are evenly divisible by Therefore,and are leap years but, and are not. Unfortunately, the designers of Lotus overlooked these facts and included the date February 29,in their version the DATE function.
So when Microsoft introduced Excel for Windows 1.
Excel DATE function with formula examples to calculate dates
On the other hand, VBA had no such restriction when it was introduced in It could correctly ignore the non-existent leap day in VBA's date serial number begins one day earlier so that it can sync up with Excel's date serial number on March 1, VBA also supports negative date serial numbers that can track dates back to January 1, Because I've heavily commented the macro, its operation should be clear if you're familiar with VBA.
The workbook also includes a working version of the table shown above, and includes several other tables that illustrate how the two macros interpret a variety of common types of data. To use the workbook, add worksheets to contain your data. Then use the formulas as shown in the tables.