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Age Calculator

Discover everything about the time you've been alive.

Date of Birth

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Enter your date of birth to see your age breakdown.

📖 About This Tool

Calculating age accurately is trickier than subtracting birth year from current year. A proper calculation must account for whether your birthday has already passed this year, handle months of different lengths, and deal with leap years correctly. Someone born on 31 March is not one year older on 28 February of a non-leap year - they reach their birthday on 1 March. This tool handles all of those edge cases.

Age is also culturally relative. In the traditional Korean age-counting system, a person is considered one year old at birth and gains a year on New Year's Day rather than on their birthday, meaning a Korean age can be one or two years higher than the international age. Most countries have moved to the international system, but the cultural difference persists in informal contexts.

How to Use

• Enter your date of birth using the date picker.
• Your age, total days, weeks, months, and hours lived are calculated instantly.
• Your star sign and the day of the week you were born are shown automatically.
• Toggle Calculate age at a specific date to find out how old you were (or will be) on any date.
• Scroll down to see your personal life milestones (10,000 days, 100,000 hours, and more).

Did You Know?

• The average person lives approximately 28,000 days - or around 4,000 weeks.
• You've taken roughly 600 million breaths by age 60.
• Your heart has beaten over 2.5 billion times by age 70.
• In some countries (like South Korea), you are considered 1 year old at birth.

✨ All calculations happen in your browser. Nothing is stored.