Age Calculator
Enter your birthdate to see your exact age, total days alive, next birthday countdown, zodiac sign, Chinese zodiac, and generation.
Your Birthdate
Enter your birthdate and click "Calculate My Age"
You are
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Total Days Alive
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Total Weeks
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Total Months
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Next Birthday
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Zodiac Sign
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Chinese Zodiac
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About You
Age Milestones
10,000 Days Old
You hit 10,000 days alive at approximately 27 years and 4 months. Many people celebrate this as a secret milestone. At the default birthday (June 15, 1995), that would be around October 31, 2022.
1 Billion Seconds Old
One billion seconds is about 31 years and 8 months. This is a fun milestone to calculate -- you can find the exact date you turned (or will turn) a billion seconds old.
Average Life Expectancy
Global average life expectancy is about 73 years (WHO, 2023). In the US it is approximately 77 years (CDC). Japan leads at around 84 years. These numbers vary significantly by country, gender, and lifestyle factors.
Generation Guide
Silent Generation: 1928-1945 | Baby Boomers: 1946-1964 | Gen X: 1965-1980 | Millennials: 1981-1996 | Gen Z: 1997-2012 | Gen Alpha: 2013+
Frequently Asked Questions
How is exact age calculated?
We calculate the difference between your birthdate and today in years, months, and days. If the current day is earlier in the month than your birthday, we borrow from the previous month. This gives you an exact age down to the day.
Does this account for leap years?
Yes. The calculation uses JavaScript's native Date object, which correctly handles leap years. If you were born on February 29, your next birthday in non-leap years would fall on March 1.
How are Chinese zodiac years determined?
The Chinese zodiac follows a 12-year cycle: Rat, Ox, Tiger, Rabbit, Dragon, Snake, Horse, Goat, Monkey, Rooster, Dog, and Pig. Technically the Chinese new year starts in late January or February, so people born in January may have the previous year's animal. This calculator uses the Gregorian birth year for simplicity.