Age Calculator
Enter a date of birth to see an exact age in years, months and days, plus handy totals and a countdown to the next birthday. Everything runs locally in your browser.
New to this? Read the Age Calculator guide →
Pick a date of birth to see the result.
How to use the age calculator
- Enter a birth date (or any start date) to get the exact age in years, months and days.
- Enter a future date to see how many days are left until it.
- It also shows the total in days, weeks or months when you need a single number.
How the age is counted
The calculator counts complete years first, then the leftover months, then the remaining days, the same way you would say someone is "32 years and 4 months old." Because month lengths and leap years differ, this calendar-accurate method is more precise than just dividing the total days by 365.
What it's good for
- Finding an exact age for forms, eligibility or milestones.
- Counting down to a birthday, holiday, due date or deadline.
- Working out how long ago an event was, in days or weeks.
For popular countdowns such as days until a holiday, see the "Popular countdowns" links above.
Where you'd use this
Working out an exact age or an interval in days — for forms, eligibility rules, anniversaries and the countdowns people actually search for.
For example: A visa application asks for age in years and months on the date of entry, not today. The calculator gives 34 years and 2 months as at that future date, which is what the form wants.
Popular countdowns
- Days until Christmas
- Days until New Year's Day
- Days until New Year's Eve
- Days until Halloween
- Days until Valentine's Day
- Days until St Patrick's Day
- Days until Christmas Eve
- Days until Independence Day (4th of July)
- Days until Thanksgiving
- Days until Easter
- Days until Mother's Day
- Days until Father's Day
- Days until Juneteenth
- Days until Black Friday
- Days until Cyber Monday
- Days until Memorial Day
- Days until Labor Day
- Days until the Melbourne Cup
- Days until Boxing Day
- Days until Veterans Day
- Days until April Fools' Day
- Days until Cinco de Mayo
- Days until Pi Day
- Days until Earth Day
- Days until Australia Day
- Days until Anzac Day
- Days until Guy Fawkes Night
Frequently asked questions
How does the age calculator work?
Enter a birth date (and optionally a target date) to get the exact age in years, months and days, plus totals such as total days or weeks.
Can it count down to a future date?
Yes. It works for any two dates, so you can also count the days until a birthday, holiday or deadline.
Is my date of birth uploaded?
No. The calculation runs entirely in your browser; your dates are never sent anywhere.