Tool
Age Calculator
Enter your date of birth and get your exact age in years, months, and days — plus total days lived, zodiac sign, and next birthday countdown.
Calculate your age in three steps
No math needed. Works instantly in any browser.
Enter your birth date
Pick your date of birth. Works for any past date.
Get your exact age
Years, months, and days appear instantly — no birthday math.
Explore more
See your age in days, hours, and how many days until your next birthday.
Age Calculator
Exact to the day
Years, months, and days. Your precise age right now, not just the year.
Age in any unit
Days, hours, minutes — see the full picture of how much time you've lived.
Next birthday
See exactly how many days until your next birthday.
About the Age Calculator
Our free age calculator gives you your exact age in years, months, and days from your date of birth. It also shows the total number of days you have lived, the day of the week you were born on, your zodiac sign, and how many days until your next birthday.
Age calculation is more precise than it looks. Simply subtracting birth year from the current year gives the wrong answer for around half of people at any given moment — because it ignores whether your birthday has passed yet this year. This calculator accounts for that correctly, along with leap years and variable month lengths.
Common uses: checking exact age for legal documents, calculating age for medical forms, verifying eligibility for age-restricted activities, or just satisfying curiosity about how many days you have been alive.
All calculations happen instantly in your browser. No data is stored or sent anywhere.
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Use itFrequently Asked Questions
How is age calculated exactly?
Age is the difference between today and your birth date. A year completes when the same month and day is reached. Someone born March 15 turns a new year on March 15 each year — not any other date.
What if I was born on February 29?
In non-leap years, February 29 birthdays are counted as February 28 for the purposes of age calculation.
Can I calculate someone else's age?
Yes — enter any date of birth. The calculator works for any past date.
Can I calculate age at a specific point in history?
This tool uses today as the end point. For historical age calculations, you'd need a date difference calculator with a custom end date.