Age
Leave the reference date as today for a current age check.
🎂
Date mathAge Calculator
Calculate exact age from a birth date and reference date.
Calculate full age from a birth date and reference date.
Birth dateReference date
This tool is for quick reference. Double-check important decisions with your own source data.
Calculation resultEnter values to see the result
Popular examples
Age todayAge on a cutoff dateAge today for someone born on 2001-05-12Age on a school cutoff date like 2018-03-01Days until the next birthday for 1994-11-03Date when someone born on 2010-01-01 turns 18Age at a future milestone for 2008-06-30Age on 2027-01-01 for a 1999-12-31 birth date100-day milestone and first birthdayPassport age check based on legal age
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DOBtodayyears
Date math
An age calculator for exact years, months, and days
Enter a birth date and a reference date to calculate age in years, total months, and total days.
It is useful for applications, enrollment checks, profile forms, and any case where an exact age on a specific date matters.
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Real examples
Age Calculator
Age today for someone born on 2001-05-12Age on a school cutoff date like 2018-03-01Days until the next birthday for 1994-11-03Date when someone born on 2010-01-01 turns 18Age at a future milestone for 2008-06-30Age on 2027-01-01 for a 1999-12-31 birth date100-day milestone and first birthdayPassport age check based on legal age
Age
How people use an age calculator
Age
Switch the reference date to a future day if you need age at a later point.
Age
Useful when official forms need an exact age on a deadline.
Example inputs
Useful examples for this calculator
Age today from a birth dateAge on a school cutoff dateAge at a future milestone
Modes
Age Calculator
Exact age
Calculate full age from a birth date and reference date.
Next birthday
See the next birthday date and how many days remain.
Milestone date
Find the date after a target number of years and months.
FAQ
Age Calculator
Does it use today's date by default?
Yes. The reference date is prefilled with today's date so you can check current age quickly.
What if the reference date is earlier than the birth date?
The calculator treats that as invalid input and asks you to choose a later reference date.