in excel how do you calculate years using dates
Every time you open the spreadsheet, Excel will update the Age cells based on the current date. To calculate the age, the DATEDIF function, set to check year, determines the number of years between the date in the DOB cell and the current date. 1  1. Open the spreadsheet that contains the DOB information you want to convert. 2  2. Insert a blank column next to the column that contains the DOB data, if needed.