Age Calculator

  • How Old Was I Calculator
    Find out how old you were on any past date. Enter your birth date and an event date to get your exact age in years, months, and days.
  • Days Old Calculator
    Find out exactly how many days old you are. Enter your birth date and an end date to get total days, weeks, and hours between two dates.
  • Age Word Problem Calculator (Parent's Age N Times the Child's)
    Solve the classic age word problem: find when a parent's age will be N times the child's age, plus each person's age at that time. Free, instant, exact.
  • Age on Other Planets Calculator
    Find out how old you'd be on Mercury, Venus, Mars, Jupiter, Saturn, Uranus and Neptune. Just enter your Earth age to see your age on every planet.
  • Age in Years, Months, and Days Calculator
    Calculate exact age in years, months, and days between a birth date and any date using accurate calendar borrowing and leap-year handling.
  • Age in Weeks Calculator
    Calculate your exact age in weeks from your date of birth. Enter a birth date to see total weeks, remaining days, and total days lived.
  • Age in Seconds Calculator
    Find out exactly how many seconds, minutes, hours and days old you are. Enter your birth date and an as-of date to calculate your age in seconds.
  • Age in Minutes Calculator
    Find out exactly how many minutes old you are. Enter your date of birth to instantly calculate your age in minutes, hours, days and seconds.
  • Age in Hours Calculator
    Find out exactly how many hours old you are. Enter your birth date to calculate your age in hours, days, and minutes instantly.
  • Adjusted (Corrected) Age Calculator
    Calculate a premature baby's corrected (adjusted) age from chronological age and gestational age at birth. Free, instant, in weeks and months.
  • Age in Days Calculator
    Find out exactly how many days old you are. Enter a birth date and an as-of date to get your age in days, weeks, months, and hours.
  • Age in Months Calculator
    Calculate your exact age in months from your birth date to today. Enter birth and current dates to get total complete months, plus years and months.
  • Age in Years Calculator
    Calculate your exact age in complete years from your birth date. Free age calculator showing total days lived and precise fractional age.
  • Age to Birthday Calculator
    Find out exactly how many days until your next birthday. Enter your birth date and today's date to count down the days, weeks, and year.
  • Cat Age Calculator
    Convert your cat's age into human years with this free Cat Age Calculator. Uses the standard veterinary scale: 15 years for year one, +9 for year two, +4 after.
  • Guinea Pig Years to Human Years Calculator
    Convert your guinea pig's age into human years instantly. Uses a lifespan-ratio of about 12.5 human years per guinea pig year.
  • Hamster Age Calculator
    Convert your hamster's age into human years. Enter years and months to estimate how old your hamster is in equivalent human years (~30:1 ratio).

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