Age Calculator
Calculate your precise age with our free age calculator. Get detailed breakdowns in years, months, weeks, days, hours, minutes, and seconds. Discover fun facts, zodiac signs, generation info, and upcoming milestones.
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How to Use
- 1 Enter your birth date — Use the date picker or type your birth date in the format shown. The calculator accepts dates from 1900 onwards.
- 2 Choose calculation date — By default, your age is calculated as of today. Toggle "Custom Date" to calculate your age on a specific date in the past or future.
- 3 View your age — Your age is displayed in years, months, and days at the top, with instant calculations as you type.
- 4 Explore alternate formats — See your age in total months, weeks, days, hours, minutes, and seconds. Each format is displayed in an easy-to-read card.
- 5 Discover fun facts — Learn when your next birthday is, what day of the week you were born on, your zodiac signs (Western and Chinese), your generation, and upcoming age milestones.
- 6 Share your results — Click the share button to copy a fun message like "I've been alive for 10,346 days! 🎂" to share on social media.
Frequently Asked Questions
How is age calculated?
Age is calculated by finding the difference between your birth date and the current date (or custom date). The calculator uses precise date arithmetic to determine years, months, and days, accounting for leap years and varying month lengths. Total time units (hours, minutes, seconds) are calculated from the exact number of days you've been alive.
What are age milestones?
Age milestones are significant day counts in your life, such as 1,000 days, 5,000 days, 10,000 days, and so on. These milestones are fun to celebrate and share. The calculator shows which milestones you've passed and when your next milestone will occur.
How accurate are the zodiac signs?
Western zodiac signs are based on your birth date and follow the traditional astrological calendar (e.g., Aries: March 21 - April 19). Chinese zodiac signs are based on your birth year and follow a 12-year cycle of animals. Both are calculated accurately according to their respective systems.
What generation am I?
Generations are defined by birth year ranges: Gen Z (1997-2012), Millennials (1981-1996), Gen X (1965-1980), Baby Boomers (1946-1964), Silent Generation (1928-1945), and Greatest Generation (before 1928). These ranges are based on commonly accepted definitions, though exact boundaries can vary by source.
Can I calculate someone else's age?
Yes! Simply enter any birth date to calculate that person's age. You can also use the custom date feature to calculate how old someone was or will be on a specific date. This is useful for planning birthday celebrations or historical research.
Is my data private?
Absolutely. All calculations happen directly in your browser using JavaScript. No birth dates or personal information are sent to any servers or stored anywhere. Your privacy is completely protected. This privacy-first approach applies to all Toolisti tools.