Universal Chronology
Exact age arithmetic, age in units, reverse age and chronological date calculations.
Age Calculator
Exact chronological age in completed years, calendar months and remaining days.
Exact Age Calculator
A detailed calendar-accurate age result for any reference date.
Age Difference Calculator
The exact calendar gap between two dates of birth.
Age in Days Calculator
Total elapsed days since a date of birth.
Age in Weeks Calculator
Completed weeks and remaining days since birth.
Age in Months Calculator
Age expressed as complete calendar months plus remaining days.
Age in Hours Calculator
A day-resolution estimate of elapsed lifetime hours.
Age in Minutes Calculator
A day-resolution estimate of elapsed lifetime minutes.
Age in Seconds Calculator
A day-resolution estimate of elapsed lifetime seconds.
Age in Specific Units Calculator
The same elapsed age represented across multiple time units.
Date of Birth Calculator
An estimated birth date from age and a selected reference date.
Reverse Age Calculator
A calendar date inferred by subtracting a stated age from a reference date.
Age on a Date Calculator
Chronological age on a past or future date.
How Old Was I Calculator
Age at an earlier event or historical reference date.
How Old Will I Be Calculator
Age on a planned future date.
Birth Year From Age Calculator
A likely birth year and date range from age information.
Decimal Age Calculator
Elapsed age represented as an approximate decimal number of years.
Age at Last Birthday Calculator
Completed whole-year age at the most recent birthday.
Age at Next Birthday Calculator
The next birthday date and age that will be reached.
Age Nearest Birthday Calculator
The nearest annual birthday and its calendar distance.
Age Gap Calculator
The elapsed gap between two personal dates.
Age Range Calculator
Whether a calculated age falls within a custom minimum and maximum range.
Birthday Age Calculator
The upcoming birthday date, weekday and turning age.