What this tool does
An age calculator works out exactly how old someone is from their date of birth — not just in years, but in months and days too. It is handy for forms, eligibility checks, milestone planning, or simply satisfying curiosity about how many days you have been alive.
How to use this tool
- Enter the date of birth.
- The calculator compares it to today's date.
- Read the exact age in years, months and days.
- See the total number of days lived.
Why it matters
Exact ages matter for official forms, age-restricted eligibility, and planning around birthdays and anniversaries. Doing it by hand is error-prone around month boundaries and leap years, so a calculator gives you a reliable answer every time.