Age Calculator
Find out exactly how old you are — in years, months, days, and more. Enter a birthdate to get your exact age, next birthday countdown, zodiac sign, and upcoming milestones.
Defaults to today. Change this to calculate age at a past or future date.
Age calculator questions
How do I calculate my exact age?
Your exact age is calculated by counting the complete years, months, and days between your birth date and today. A year is complete only if both the month and day have passed. This calculator gives you your age in years, months, and days — plus bonus stats like total days lived and days until your next birthday.
What day of the week was I born on?
This calculator tells you what day of the week you were born. You can also verify using a perpetual calendar — the year, month, and date determine the weekday via a calculation known as Zeller's Congruence or the Doomsday algorithm. Most people don't know their birth day of the week and find it surprisingly interesting.
How many days old am I?
The number of days you've lived is your age in years multiplied by approximately 365.25 (accounting for leap years), adjusted for the exact date. This calculator computes your exact total days lived to the day.
How do I calculate someone's age for a birthday gift?
If you're shopping for a birthday gift and want to get the right age-appropriate item, subtract the person's birth year from the current year — then subtract 1 if their birthday hasn't happened yet this year. For gift ideas by age, see our birthday gift guides organized by recipient and age group.
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