The exact age calculator is the fastest way to calculate an age when the person's date of birth is known. If you want to figure it out manually, subtract the birth date from the current date, and you will get the result. For example, this year is 2022, and you were born in 2003. So your age is 2022 - 2003 = 19. You can also find age by asking relatives, friends, or colleagues or checking their resumes.