Years, months, days
Compute age from date of birth with optional live clock and detailed totals.
Interactive calculator loads when JavaScript is enabled. All calculations stay on your device.
The top row is calendar age: full years, then months, then days between your origin and end date and time (with borrowing, like a civil date difference). Below the divider you see whole-unit totals — weeks plus leftover days, total days, and cumulative hours, minutes, and seconds across the full span.
On End time, turn on Use current time to set the end date and clock to now and keep them updating every second. Turn it off to pick a fixed end date and time manually.
Yes, when Use current time is off. Drag left or right on The Age results to move the end date and time; it stays between your origin and today.
The end moment must be the same as or after the origin (date and time). If the end is earlier, fix the dates or times and the age will calculate again.
All dates and times use your device’s local time zone. Enter origin and end in the same zone you care about — usually where you were or are now.
No. Everything runs in your browser. Dates and results are not uploaded or saved on a server.