Key takeaways
- Age Calculator works out exact age in years, months and days from a birthdate, accounting for leap years correctly.
- Useful for official forms, eligibility checks (age requirements), or just settling an argument about someone's exact age.
- You can calculate age as of today, or as of any other date — useful for 'how old will they be on X date' questions.
Using it
Open Age Calculator, enter a birthdate, and the exact age in years, months and days appears — change the "as of" date if you need the age on a specific future or past date rather than today.
Frequently asked questions
Does it handle leap years correctly?
Yes — the calculation accounts for leap years and varying month lengths, so the day count is exact rather than a rough estimate.
Can I use it to count days until a future date, not just age?
For a general day-count between two dates (not specifically age from a birthdate), [Days Between Dates](/days-between-dates) is built for that.