Why exact age matters
Whether you're filling out a form, checking eligibility for a program, or just curious, knowing your exact age in years, months and days is more precise than a birth year alone. Ageify calculates it instantly and entirely in your browser — no data is ever sent anywhere.
Frequently asked questions
How is age calculated exactly?
We find the difference between your birth date and today's date, counting full years first, then remaining months, then remaining days — exactly how you'd count on a calendar.
Can I calculate age between two custom dates?
Yes — set both "Date of birth" and "Age as of" to any dates you like to calculate age as of a specific point, useful for legal or eligibility checks.
Does this account for leap years?
Yes, the calculation uses JavaScript's native date engine, so leap years and varying month lengths are handled automatically and accurately.