Age Calculator
Calculate exact age in years, months and days, plus total days and weeks lived.
How it works
The calculator counts full years, then remaining months and days between the two dates, using actual calendar month lengths and leap years.
Formula
Age = full years + remaining months + remaining days between birth date and the chosen date
Example
Born January 15, 1990, on January 15, 2025 the age is 35 years, 0 months, 0 days.
FAQ
Does it handle leap years?
Yes. It uses real calendar dates.
Is my date stored?
No. Everything is calculated in your browser.
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Related guides
Guides are coming soon. Visit the guides page.