Age Calculator
Calculate your exact age and the difference between any two dates instantly. Runs entirely in your browser.
Age Calculator
Exact Age
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Date Difference
Total Duration
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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.
Specifications
- Accepts
- No file needed
- Gives you
- On-screen result
- Where it runs
- Your browser — the file is never uploaded
- Sign-up
- None
- Cost
- Free, with no usage limits
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.