Age Calculator
Calculate your exact age in years, months and days from your date of birth, on today or any date. Plus next birthday, zodiac sign and time alive.
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About this tool
This age calculator works out your exact age from your date of birth: years, months and days, plus the totals in months, weeks, days, hours, minutes and seconds. By default it calculates your age today, but you can pick any other date, which is handy for forms that ask for your age on a deadline, an exam date or the day a contract starts.
How to calculate your age
- Enter your date of birth.
- Keep Use current date on, or choose another date in Calculate age on.
- Click Calculate age to see your age in years, months and days with all the totals.
What the results show
- Exact age in years, months and days.
- Total time in months, weeks, days, hours, minutes and seconds.
- Time alive, a live counter that ticks every second.
- Next birthday: the date, the weekday it falls on and how many days are left.
- Zodiac sign, generation (for example Millennial or Gen Z) and the season you were born in.
- Life milestones such as becoming a legal adult, a quarter century or retirement age, marked as reached or still ahead.
- Fun facts and a few historical events that happened during your lifetime.
How age is calculated
Age is counted in full years first, then the full months since your last birthday, then the remaining days. Months have different lengths, so the calculator works with real calendar dates rather than an average of 30 days, and it accounts for leap years.
When you need your exact age
- Applications and forms that ask for your age on a specific date, such as job, visa, school or competition entries with an age limit.
- Insurance, pensions and benefits where eligibility starts at an exact age.
- Children's ages in months for health checks and school entry.
- Planning a birthday with a countdown to the big day.
Frequently asked questions
How do I calculate my age on a specific date?
Enter your date of birth, turn off Use current date and pick the date in Calculate age on. The result shows your exact age in years, months and days on that day.
How is age calculated in years, months and days?
The calculator counts complete years since your birth, then complete months since your last birthday, then the remaining days, using real calendar dates and leap years.
How many days old am I?
Enter your date of birth and the results include your total age in days, as well as weeks, hours, minutes and a live count of seconds.
How many days until my next birthday?
Enter your date of birth and the results show the date of your next birthday, the weekday it falls on and the number of days left.
How old am I in seconds?
The Time alive counter shows your age in seconds and keeps counting live while the page is open.
Is my date of birth stored?
No. The calculation happens in your browser and your date of birth is not sent to or saved on any server.