Age Calculator
Find exact age in years, months and days between a date of birth and a chosen date.
How to use Age Calculator
Three quick steps — no sign-up needed
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Step 1
Enter date of birth
Select or type the birth date you want to measure from.
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Step 2
Choose the age-at date
Leave as today or pick another date (for example an event or school cutoff).
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Step 3
Read years, months, days
See exact age broken down - not only a rounded year count.
About Age Calculator
Age Calculator finds exact age in years, months, and days from a date of birth to today or any date you choose. People search "age calculator", "how old am I", and "age in years months days" when forms ask for precise age or when planning age-based eligibility.
Enter date of birth and the "age at" date (defaulting to today when you leave it current). The result accounts for calendar month lengths rather than assuming every month has the same number of days.
Age for legal, school, or medical eligibility can depend on local rules (timezone, whether the birthday counts as completed). Use official documents when a deadline is binding.
This tool is for everyday exact-age arithmetic, not a legal determination of majority or eligibility.
Benefits of Age Calculator
Frequently asked questions
How do I calculate exact age?
Enter date of birth and the date you want age measured on; the tool returns years, months, and days.
Can I calculate age on a future date?
Yes - set the age-at date to that day.
Why does my result differ from another site?
Month-length handling and timezone cutovers can differ slightly at boundaries.
Does this use my timezone?
Dates are calendar dates as entered; for legal cutoffs follow local rules.
Is this legal proof of age?
No - official ID and local law decide eligibility.