Unit Converters · Free tool
Age Calculator
Calculate exact age in years, months, and days from any birth date to any target date.
Age
31years1months8days
327 days to next birthday
Months
373
Weeks
1,623
Days
11,361
Hours
272,664
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What it does
A free age calculator that returns your exact age in years, months, and days — plus total months, weeks, days, and hours lived, and days until your next birthday. Enter your birthdate and a target date; everything computes live in the browser.
Age calculators are useful for forms that need exact age-at-date, planning milestones (retirement, eligibility), or just curiosity. The total-days-lived number is a surprisingly motivating number to know — it’s finite, it’s counting, and it puts daily habits in perspective.
Embed this tool on your siteShow snippetHide
Paste this snippet into any page. Loads on-demand (lazy), no tracking scripts, and sized to most dashboards. Replace the height to fit your layout.
<iframe src="https://freetoolarena.com/embed/age-calculator" width="100%" height="720" frameborder="0" loading="lazy" title="Age Calculator" style="border:1px solid #e2e8f0;border-radius:12px;max-width:720px;"></iframe>How to use it
- Enter your birthdate.
- Optionally set a target date (defaults to today).
- Read your age in years/months/days, plus total units lived.
- Check the countdown to your next birthday.
Frequently asked questions
- Does it account for leap years?
- Yes. The calculator uses the actual calendar — Feb 29 exists in leap years and gets counted correctly. Someone born on a leap day technically has a birthday every four years, but the calculator always returns a birthday on Feb 28 or Mar 1 in non-leap years.
- Can I calculate age as of a past date?
- Yes — set the target date to any past date. Useful for life-insurance policies that rate you as of a contract date, or historical research (how old was someone when an event happened).
- Is this accurate to the day?
- Yes, with caveat: time zones are ignored. If you were born at 11pm in UTC+1 and the calculation runs in UTC-8, the day count may be off by one. For pet age or routine use this is irrelevant.
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Learn more
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