Age Calculator — Free Online Tool
Find your exact age in years, months, days, hours & minutes. · No signup · Works on mobile
100% private: your data is processed in your browser. Nothing is uploaded to our servers.
How to use the age calculator
-
1
Select your date of birth from the calendar picker.
-
2
Optionally change the "as of" date to calculate age at any point in time.
-
3
See your precise age, total time lived, birth weekday, and next-birthday countdown.
What does this tool do?
This free age calculator computes your exact age from your date of birth — in years, months, and days, plus total weeks, days, hours, and minutes lived. It also counts down the days to your next birthday and tells you which day of the week you were born.
How does the age calculator work?
The tool performs calendar-aware date arithmetic in your browser: it counts full years first, then remaining full months (respecting each month's real length and leap years), then leftover days — the same method used for official age computation.
Frequently Asked Questions
How is exact age calculated in years, months and days?
Count complete years from your birthday, then complete months from the last "monthly birthday", then leftover days using real month lengths. Someone born 15 March 2000 is, on 2 August 2026, exactly 26 years, 4 months, 18 days old — leap years included automatically.
How do leap-year birthdays (Feb 29) work?
People born on 29 February have a real birthday only every 4 years (about 5 million people worldwide). Legally, most jurisdictions treat 1 March — or 28 February in places like New Zealand — as the anniversary in non-leap years. This calculator handles the date math correctly either way.
Is the age calculator really free?
Yes — 100% free with no hidden charges, trial limits, or premium tiers for core features. You don't need to create an account or enter an email address. The site is supported by non-intrusive display ads, which keeps every tool free for everyone.
Is my data private when using the age calculator?
Completely. The age calculator runs entirely in your browser using JavaScript — nothing you type or upload is sent to our servers. When you close the tab, your data is gone. This makes it safe for confidential documents, financial figures, and personal information.
Does the age calculator work on mobile phones?
Yes. The age calculator is built mobile-first and works on any phone or tablet with a modern browser — iPhone (Safari), Android (Chrome), and everything in between. The layout adapts to small screens, so buttons and inputs stay easy to tap on a 375px-wide display.
Do I need to install anything to use the age calculator?
No. The age calculator works directly in your web browser — no downloads, no extensions, no signup. Just open the page, use the tool, and get your result instantly. It works on Windows, macOS, Linux, ChromeOS, iOS, and Android.