Age Calculator: Birthday

Know your exact age down to the day. Birthday countdowns, zodiac, milestones and date difference — 100% offline, no account needed.

How old are you, exactly? Age Calculator answers instantly — and works completely offline.

Enter a birth date and get your age in years, months and days, with correct leap-year and February 29 handling. Then see how long until the next birthday, which weekday it falls on, and how many days you have been alive.

MAIN FEATURES

• Exact age in years, months and days • Next birthday countdown, with the weekday it lands on • Western zodiac sign and lunar zodiac animal • Totals: months, weeks, days and hours lived, plus fun estimates • Date difference: the distance between any two dates • Life milestones: 10,000 days, 1 billion seconds, round-number ages • Saved birthdays for family and friends, sorted by who is next • Birthday reminders so you never forget again • Lunar calendar: lunar birth date and sexagenary (stem-branch) pillars • Light and dark themes • 33 languages

WHY PEOPLE USE IT

Figure out a child's exact age for a school form. Check how many days until an anniversary. Count the days between two dates for a contract or a trip. Find out which weekday you were born on. Keep every family birthday in one place and get reminded before each one.

PRIVATE BY DESIGN

No account, no sign-up, no internet needed. Nothing you enter leaves your device. The app works on a plane, in a basement, anywhere.

REMOVE ADS

One optional in-app purchase removes all ads permanently. Everything else in the app is free, with no subscription and no paywalled feature.

Download Age Calculator free and find out your exact age today.