Why we built this
Most age calculators stop at a number. We wanted to build the one we'd actually use: an age calculator online that is exact to the second, respects your privacy, and gives back something genuinely interesting — your birth weekday, your generation (Gen X to Gen Alpha), your Western and Chinese zodiac signs, a live countdown to your next birthday and a full century of birthdays with their weekdays.
What makes it different
- Exactness. Calendar-aware math handles leap years, varying month lengths and optional time of birth — down to hours and minutes.
- Privacy. Every calculation runs locally in your browser. No accounts, no tracking, nothing stored or sent.
- Free forever. No paywalls, no usage limits, no sign-up. Export results as PNG images and share them anywhere.
- Depth. Compare ages with family and friends, work backwards from any age 1–100, or jump straight to any birth year 1900–2050.
How the math works
Your age is computed with true calendar arithmetic — the same way you would count on a wall calendar: full years first, then remaining months, then remaining days, borrowing month lengths as needed. Adding a time of birth extends precision to hours and minutes, and a live ticker counts every second you've been alive.
Say hello
Questions, ideas or bug reports? We'd love to hear from you — reach out via the contact page.