Age Calculator - Date of Birth

Put in a date of birth and get your exact age in seconds. Years, months and days, then the same life counted again in weeks, hours and minutes. That is the quick answer. Everything after it is the part people stay for.

An age calculator by date of birth that runs entirely on your phone, needs no account, and works offline.

How old am I, exactly
Pick a birth date and read your age down to the day. Move the reference date and you get your age on any day in the past, or on one that has not arrived yet. The date of birth calculator also runs backwards: give it an age and it returns the birth date behind it, along with the day of the week you were born on. Newborns get the same care, in weeks and months rather than years.

Age gap calculator
Put in two dates and get the exact distance between them. Two birth dates give you the age gap between two people in years, months and days, which makes this an age difference calculator too. Any other pair gives you the days between two dates, which covers anniversaries, notice periods and visa forms.

How many days have I been alive
A running count of what your body has quietly got through. Heartbeats, breaths, blinks, hours slept, steps walked, meals eaten, moon cycles lived and trips around the Sun. Then leave the planet and see your age on Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune and the Moon.

Birthday countdown
How many days until your birthday, ticking down to the second, with the weekday it lands on, the season and the day of the year. Save the birthdays of family and friends and you get a reminder however many days ahead you choose. The reminders are built on your phone and nothing is sent anywhere.

Dog years and cat years, done properly
Dog years to human years using the modern size based model instead of the old multiply by seven myth. Choose small, medium, large or giant and compare the full dog age chart across every size. The cat age calculator does the same job for cats, turning cat years into human years with the life stage that goes with the number. Both run in reverse as well, from human years to dog years.

Golden birthday, half birthday, and the dates nobody tells you about
Your golden birthday is the year your age matches the day of the month you were born on. Most people never hear about theirs. The app finds yours, along with your half birthday and your silver and diamond years.

What generation am I
Boomer, Gen X, Millennial, Gen Z, Gen Alpha or Gen Beta. You get your cohort, the years it spans, and a few of the things that shaped it.

Zodiac, Chinese zodiac animal, birthstone and birth flower
A birth date is all a star sign calculator needs. Read your zodiac sign with its dates and traits, your Chinese zodiac animal, your birthstone and your birth flower by month. All twelve signs are covered and no birth time is required.

Leap years and other date trivia
Check whether any year is a leap year, count the leap years you have lived through, and see where February 29 birthdays fall. Leaplings get a proper answer instead of a shrug.

Share it
Turn any result into a card worth sending. Square, story or wide, light or dark, in the accent colour you pick. The card is drawn on your phone and you choose where it goes.

Built to be easy
Big readable numbers, a date wheel you spin with your thumb instead of typing, light and dark themes that follow your phone, and eleven languages including Arabic, Hindi, Tamil, Turkish and Urdu with full right to left support.

Free and supported by ads. Saved birthdays stay in the app's private storage on your phone, there is no server and no account, and nothing leaves the device unless you share a card yourself. Results are for curiosity and everyday planning, not medical, legal or financial advice.