Calculate your exact age in years, months, days, and hours from any date of birth. See how many days until your next birthday.
Enter a date of birth and instantly see the exact age broken down into years, months, days, and hours. The tool also shows how many days remain until the next birthday. Works for any date in the past — useful for checking ages, calculating anniversaries, or satisfying idle curiosity.
Pick a date of birth using the date picker. All age breakdowns update immediately. The result also shows how many days until the next birthday.
Months are calculated as calendar months. For example, 15 Jan to 15 Feb is exactly 1 month regardless of how many days each month has.
Yes. The day calculation uses exact calendar dates, so February 29 birthdays and leap year differences are handled correctly.
This tool runs entirely in your browser. Nothing you type or paste is sent to any server — all processing happens locally on your device.
You can also pass a date to this tool using the date URL parameter (e.g., ?date=YYYY-MM-DD).
If you choose to save your date, it is stored in a local cookie and never leaves your device.