Calculate your exact age in years, months, days, hours, minutes, and seconds. Discover your next birthday countdown, zodiac sign, Chinese zodiac, generation, and even your age on other planets — free, instant, no signup required.
Get comprehensive age insights beyond just years — from exact seconds to your age on Mars.
Calculate your exact age down to years, months, days, hours, minutes, and seconds. See the full precision of time elapsed since your birth date.
Know exactly how many days remain until your next birthday. See which day of the week it falls on and plan celebrations in advance.
Discover your Western zodiac sign with date ranges and your Chinese zodiac animal with its associated element. Learn what your signs say about you.
Find out which generation you belong to — Gen Z, Millennial, Gen X, Baby Boomer, or Silent Generation — with detailed year ranges.
Calculate your age on all 8 planets. Each planet has a different orbital period — your age on Mercury is very different from your age on Neptune!
See which major life milestones you've passed and which are approaching. Track your 18th, 21st, 30th, 40th, 50th birthdays and more.
This calculator uses JavaScript's Date object for precise calculations. It accounts for leap years, varying month lengths, and timezone differences. Age in years is calculated by comparing birth date with the current date, adjusting for whether the birthday has occurred this year. Total days, hours, minutes, and seconds are calculated from the exact millisecond difference between the two dates. The precision is limited only by your system clock accuracy.
Planetary ages use each planet's orbital period (the time it takes to complete one orbit around the Sun) relative to Earth's 365.25-day year. Mercury's year is just 88 Earth days — so you'd be much older in "Mercury years." Neptune's year is 60,190 Earth days — making you much younger. The formula is: Earth Age in Days ÷ Planet's Orbital Period in Days. Orbital data is sourced from NASA's planetary fact sheets.
Western zodiac signs follow the tropical zodiac system used by most Western astrologers, based on the position of the Sun relative to the equinoxes. Date ranges may shift by 1 day depending on the year due to leap years and the precession of equinoxes. Chinese zodiac follows the lunar calendar — if your birthday falls in January or early February, your sign may belong to the previous year. For precise Chinese zodiac, consult a lunar calendar for your specific birth year.
Generations are defined by the Pew Research Center and other demographic organizations: Gen Alpha (2013-2025), Gen Z (1997-2012), Millennials (1981-1996), Gen X (1965-1980), Baby Boomers (1946-1964), and Silent Generation (1928-1945). These ranges are approximate — there's no official governing body for generation definitions, and different sources may use slightly different cutoffs.
Yes. JavaScript's Date object automatically accounts for leap years in all calculations. When calculating the difference between two dates, February 29th in leap years is properly handled. Total days, weeks, months, and years are all computed with leap year awareness. This ensures your age calculation is accurate regardless of how many leap years have occurred since your birth.
Calculate your precise age in seconds, discover your zodiac signs, and explore your age across the solar system.
🎂 Calculate Your AgeNote: Age calculations are based on your device's current date and time. Planetary age calculations use NASA orbital data. Zodiac signs follow the tropical zodiac system. This tool is for entertainment and informational purposes.