Age Calculator (Exact Years, Months & Days)

Find your exact age in years, months, days, hours, minutes and even seconds — including days until your next birthday.

100% free No sign-up Private · runs in your browser

How to use the free online age calculator

Enter the birth date.
Optionally change the 'as of' date.
See exact age in years, months and days.
Check days until the next birthday.

About this tool

Calculate your exact age in years, months, days, hours, minutes and even seconds from your date of birth. Also shows the date of your next birthday and how many days until it. Perfect for milestones, forms, pensions and fun facts. Free, instant, fully private.

Key features

Exact years, months, days
Hours, minutes & seconds
Days until next birthday
Any date, past or future

Privacy first: every calculation and generation runs 100% locally in your web browser using the Web Crypto API. Your input never touches a server — nothing is stored, logged or sold.

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Frequently asked questions

It computes the difference in calendar years, then months, then remaining days between your birth date and the chosen date — the same way official documents do.

Yes. You can set any 'as of' date — useful for visa applications, contracts or historical records.

Yes, leap years are accounted for in the day calculations.