Our free age calculator determines your precise chronological age from your birth date. Get your exact age in years, months, days, weeks, and even hours. Calculate age differences between two people, find out how old you'll be on a future date, and see the countdown to your next birthday. Perfect for official documents, milestone celebrations, and curiosity.
Age Analysis for January 15, 1990:
Fun fact: You've experienced about 475 full moons in your lifetime!
Select your birth day, month, and year from the dropdowns.
Get your age in years, months, days, and more instantly.
Change the target date to see your age on any future date.
Enter a second birth date to calculate age difference.
Age is calculated by finding the difference between two dates, accounting for varying month lengths and leap years. The calculation breaks down into complete years, remaining months, and remaining days for precise age representation.
Age = Target Date - Birth Date
Your chronological age is used for legal documents, insurance, and official purposes
Age in months is often used for infants and toddlers (0-3 years)
Leap year babies (Feb 29) celebrate on Feb 28 or Mar 1 in non-leap years
Your biological age may differ from chronological age based on lifestyle
Some cultures count age differently — Korean age adds 1-2 years
Age milestones: 18 (adult), 21 (full adult rights), 65 (retirement)
Our free age calculator instantly determines your exact age in years, months, and days from your date of birth. Calculate how old you are today, find age differences between two people, see your age in days/weeks/hours, and countdown to your next birthday.
Enter your birth date to find your precise chronological age. Our age calculator shows your age in years, months, and days, accounting for varying month lengths and leap years. Results update automatically based on today's date.
Beyond years and months, discover how many total days you've lived. See your age in weeks, days, hours, and even minutes. Perfect for milestone celebrations like your 10,000th day alive or 1 billion seconds birthday.
Calculate the exact age gap between two people by entering both birth dates. See the difference in years, months, and days. Useful for couples, siblings, or comparing any two ages with precision.
Find out exactly how many days until your next birthday. See what day of the week it falls on and plan your celebration. The countdown updates daily for accurate planning.
Data sourced from trusted institutions
All formulas verified against official standards.