Age Calculator
Enter your date of birth and get your exact age broken down in years, months and days — plus your age in total days, weeks, hours and minutes.
Age Calculator
How It Works
Three steps to your exact age.
Enter your birth date
Pick the date of birth from the calendar field.
Calculate
Press Calculate Age to compute your exact years, months and days.
Review the breakdown
See total hours, minutes, days and weeks, plus your next-birthday countdown.
FAQ
Common questions about the age calculator.
How is exact age calculated?
It compares today with your date of birth, adjusting for month and day boundaries to report exact years, months and days.
What totals are shown?
Your age in total days, weeks, hours and minutes, plus age in months and weeks.
Does it handle leap years?
Yes. The JavaScript Date calendar accounts for leap years automatically.
How does the birthday countdown work?
It finds the next occurrence of your birthday and counts the days until it, with a special message on the day itself.
Is my date of birth stored?
No. Everything runs locally in your browser — nothing is saved or uploaded.
Why does age track weekly?
Age in weeks and months are common for tracking infant and pet ages, so they are shown alongside the day totals.