Calculate your exact age in years, months, days, hours, and minutes with next birthday countdown.
An age calculator computes your exact age from a date of birth, broken down into years, months, days, hours, and minutes. OneToolBox's Age Calculator also displays total days lived, weeks lived, and a countdown to your next birthday with days remaining. All calculations happen locally in your browser with zero data transmission.
The calculator accounts for leap years, varying month lengths, and timezone differences to provide precision down to the minute. It uses JavaScript's native Date API for calendar-accurate arithmetic.
The tool calculates age from your entered birth date to the current date/time. For calculating duration between two arbitrary dates, use the birth date field for the start date.
Yes. The calculator correctly handles February 29 birthdays and all leap year rules, including the century exception (years divisible by 100 but not 400 are not leap years).
No. Your date of birth is processed entirely in your browser and never sent to any server or stored in any database.
