Birthstone & Birth Flower Finder
The gems and flowers for your birth month and what they mean.
Age Calculator & Birthday Countdown
Find your exact age down to the second, see how many days, weeks and hours you’ve lived, discover the day of the week you were born and watch a live countdown to your next birthday.
- Live countdown
- Leap-year aware
- Fun milestones
How to Use the Age Calculator
- Enter your date of birth. Add your birth time too if you want your age to the exact second.
- Press “Calculate my age”. Your age appears in years, months and days, and keeps ticking live.
- Explore your numbers. See your total days, weeks and hours lived, fun life estimates, your zodiac signs and upcoming milestones — and watch the countdown to your next birthday.
How Age Is Calculated
Calculating age sounds simple, but months have different lengths. The calculator works the way people naturally count:
- Years: the number of birthdays you have already celebrated.
- Months: complete months since your last birthday.
- Days: days since the same date last month, borrowing the correct number of days from the previous month when needed.
- Hours, minutes and seconds: time since your birth time on the most recent day.
Totals such as days and hours lived are worked out directly from the time between your birth and now. The countdown targets midnight at the start of your next birthday in your local time zone.
Birthday Facts and Fun Milestones
What day of the week were you born?
An old nursery rhyme says “Monday’s child is fair of face, Tuesday’s child is full of grace, Wednesday’s child is full of woe, Thursday’s child has far to go…”. The calculator tells you your birth weekday, so you can see which line is yours.
Unusual milestones worth celebrating
- 10,000 days: around 27 years and 5 months old.
- 1,000 weeks: just over 19 years old.
- 1 billion seconds: about 31 years and 8 months old.
- 20,000 days: about 54 years and 9 months old.
Leap-day babies
Only about one person in 1,461 is born on 29 February. These “leaplings” usually celebrate on 28 February or 1 March in common years. Fun fact: in leap-day terms, a 40-year-old has had only 10 true birthdays.
Make your birthday even more personal by discovering your birthstone and birth flower, your Chinese zodiac animal and your Life Path number.
Frequently Asked Questions
The calculator counts complete years since your birthday, then complete months since your last birthday, then the remaining days, hours, minutes and seconds. It works on your device’s clock and updates every second.
Leap-day birthdays happen only every four years. In common years the countdown targets 28 February, which is the most widely used convention, and the result reminds you of your real leap-year birthdays.
It’s optional. Adding a time makes the hours, minutes and seconds of your age precise. Without it, midnight is used.
They are fun estimates based on average resting rates of about 80 heartbeats and 16 breaths per minute. Your real numbers depend on age, fitness and activity.
One billion seconds is about 31 years and 8 months. Many people celebrate it as a quirky milestone — the calculator shows yours, along with your 10,000-day and 1,000-week milestones.
No. Everything is calculated in your browser and nothing is saved or sent.