Birthday Calculator
Find your exact age, the day you were born, your next birthday, and how many days and hours you've been alive.
Exact age
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Born on
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Next birthday
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Days until birthday
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Total days lived
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Total hours lived (approx.)
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What is Birthday Calculator?
A birthday calculator goes beyond a simple age calculator. It tells you the exact day of the week you were born, how many days and hours you have been alive, when your next birthday falls, and how many days until that birthday. It's a fun and informative tool for celebrating milestones.
How to use
- 1 Enter your date of birth using the date picker.
- 2 All results appear instantly: exact age, birth weekday, next birthday date, days until next birthday, total days lived, and total hours lived.
Example calculation
Someone born on March 15, 1995 was born on a Wednesday. As of June 22, 2026 they are 31 years, 3 months, and 7 days old — that's 11,421 days or 274,104 hours. Their next birthday is March 15, 2027, which is 266 days away.
Frequently asked questions
How accurate is the 'hours lived' figure?
It's calculated from midnight on your birth date to now, so it doesn't account for your exact birth time. Subtract or add hours manually if you know your birth time.
What if my birthday is today?
The calculator will show 0 days until next birthday and display a birthday message.
Can I use this for someone else's birthday?
Absolutely — just enter any date of birth.