This is perfect for figuring out things like how many days old you are or how many days it is until your next vacation.Īll you have to do is select the start and end date, and the calculator will determine the months, weeks, and days between the two. The Date Calculation mode is a handy little tool that lets you calculate the difference between two specific dates. Also, Programmer mode lets you switch between Byte (8 bits), Word (16 bits), DWord (32 bits), and QWord (64 bits) and has an option for binary bit toggling.