Age & Date Calculators
Exact, calendar-correct age and date math, including leap years — for birthdays, forms, testing, school enrollment and sports.
Age Calculator Between Two DatesCalculate exact age between two dates in years, months and days, plus total months, weeks, days and hours. Works for birthdays, anniversaries and any date span.Calculate Birthday DateCalculate a birthday date from an exact age in years, months and days on a given date. Also shows the weekday you were born. Free birth date calculator.How Many Days Left for My Birthday?Count down the days until your next birthday. See the exact number of days and weeks left, the weekday it falls on and the age you'll turn.How Many Years CalculatorFind how many years are between two dates — full years, exact decimal years, and years, months and days. Perfect for anniversaries, service time and “how many years ago”.Cat Age CalculatorConvert your cat's age to human years using the veterinary (AAHA) guideline: 15 at age 1, 24 at age 2, then 4 years per year. Plus life stage.Date of Birth to Be 21 TodaySee the latest date of birth that makes someone 21 (or 18, 16, 65…) today. Ideal for bartenders, cashiers and ID checks. Updates automatically every day.Online Chronological Age CalculatorCalculate chronological age from date of birth and test date in years;months;days, as used for psychological, speech and educational assessments and screenings.How Many Months in 18 Years?18 years is 216 months, about 939 weeks and 6,574–6,575 days. Convert any number of years to months, weeks, days and hours with this free converter.What Year Was 18 Years Ago?Find the year and exact date N years ago from today (18 years ago was 2008). Works for any number of years and any starting date.Adjusted Age CalculatorFind a premature baby's adjusted (corrected) age from birth date and due date, alongside chronological age and how many weeks early the baby was born.School Age CalculatorFind the year your child can start kindergarten from their birth date and your state's age cutoff, plus their typical grade and graduation year.Little League Age CalculatorFind a player's Little League age for baseball (age on August 31) or softball (age on December 31 of the prior year) and the typical division.