Age Calculator
Calculate your exact age and the difference between any two dates instantly.
🎂 Age Calculator
Exact Age
—
Days lived —
Day of week born —
Next birthday —
📅 Date Difference
Total Duration
—
Total days —
Weeks —
Months (approx.) —
Business days —
About Age Calculator
- Calculates exact age in years, months, and days — accounting for different month lengths and leap years.
- Shows total days lived, the day of the week you were born, and a countdown to your next birthday.
- Date Difference counts total days, weeks, approximate months, and business days (Monday–Friday).
- Business days excludes weekends but does not exclude public holidays.
- You can calculate age at any past or future target date, not just today.
FAQ
How is the exact age calculated?
Age is calculated by comparing year, month, and day components precisely. It handles cases where the current month and day are before the birth month and day, and correctly accounts for months with different numbers of days.
Are leap years handled correctly?
Yes. The calculator uses JavaScript Date objects which account for leap years automatically in all date arithmetic.
What counts as a business day?
Business days are Monday through Friday. Weekends (Saturday and Sunday) are excluded. Public holidays are not excluded as these vary by country and region.
Can I calculate the age of something other than a person?
Yes. The Age Calculator works for any date — a project start date, a company founding date, a product launch, or anything else.