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Calculate calendar age for a birth date and chosen reference date.
ProductivityClick the 'Date of Birth' field and select or type your birth date.
The 'Calculate Age As Of' field defaults to today — leave it or change it to any other date.
Your exact age in years, months, and days appears instantly.
Check the birthday countdown panel to see how many days until your next birthday.
Confirm whether someone has reached the legal age for voting, driving, drinking, or signing contracts on a specific date.
Doctors and nurses quickly determine a patient's age in months and days — critical for dosage and developmental milestones.
Calculate an employee's exact age on a hire date or confirm retirement eligibility to the day.
Find out exactly how many days until your birthday (or a friend's) to plan a surprise well in advance.
Calculate your exact age in years, months, and days from any date of birth. You can also find out how many days until your next birthday, and calculate age as of any past or future reference date — useful for legal, medical, or HR scenarios.
Found incorrect guidance or a result? Send the team steps and a non-sensitive example.
Convert year numbers between Buddhist Era and Common Era using a 543-year offset.
Check a Thai ID number's format and checksum without verifying its owner or issuance.
Set minutes and seconds for a countdown with start, pause and reset controls.
Generate a password with a chosen length and selected character groups.
Compare current times for the fixed set of cities displayed by the tool.
Calculate adult BMI from weight and height using the displayed category thresholds.