FAQ
How is age calculated exactly?
Age is calculated by finding the difference between your birth date and today in years, months, and days. Our calculator accounts for varying month lengths and leap years.
What is a leap year?
A leap year has 366 days (February 29 added). It occurs every 4 years, except years divisible by 100 (unless also divisible by 400). So 2000 was a leap year but 1900 was not.
How do I calculate age in days?
Subtract your birth date from today's date. Our calculator converts this to total days, weeks, hours, and even minutes lived.
What is the legal age for various activities?
In the US: Driving 16, Voting 18, Drinking 21, Renting a car 25, Running for Congress 25, President 35. Ages vary by country.
How does the zodiac sign work?
Western zodiac is based on your birth date's position relative to constellations. There are 12 signs, each covering roughly 30 days. Chinese zodiac cycles every 12 years.