Age Calculator by Date of Birth
Find your exact age by entering your date of birth. Our free online tool calculates age in years, months, days, hours, minutes, and seconds — updated as you type.
Calculate Age from Date of Birth
An age calculator by date of birth is one of the most commonly used online tools. Simply enter your date of birth (DOB), and the calculator does the rest — accounting for leap years, different month lengths, and daylight saving time where applicable.
Knowing your exact age can be useful for medical purposes, filling out forms, retirement planning, or just for fun. Our calculator also shows milestone information like total days lived, hours lived, and your next birthday countdown.
All calculations happen entirely in your browser. Your date of birth is never stored, transmitted, or shared with any third party. Use it as many times as you like, completely free.