Years, months, weeks, days, hours — plus birthday countdowns, retirement planning, exam eligibility, age differences, and fun milestones. All in your browser.
Enter a birth date (or any starting date/event). Time and location are optional, for extra precision.
Compare two people, two events, or any two dates.
Uses the date of birth entered above.
Uses the date of birth entered above. Checks your exact age as of a cutoff date against a required range.
Saved only on this device — never uploaded anywhere.
Many official forms — school admissions, competitive exams, insurance, employment, retirement planning, and legal documents — require an exact age, not an approximation. Manual math is easy to get wrong once leap years and varying month lengths are involved. This tool handles that automatically.
It uses calendar-aware math that accounts for leap years and varying month lengths, plus true elapsed time for hours, minutes, and seconds — accurate to the second if you provide a birth time.
Yes. Switch the reference date to "A specific date" and pick any date — useful for exam eligibility, historical records, or future planning.
Leap years add an extra day roughly every 4 years. Ignoring them in manual math can shift day counts. This tool accounts for it automatically, and flags February 29 birthdays specially.
Yes, use the Age Difference tool — enter both dates of birth (or any two dates/events) and get the exact gap between them.
The Eligibility Checker computes your exact age as of a cutoff date and compares it against a minimum and optional maximum age you specify, then tells you if you qualify.
No. Every calculation runs locally in your browser. If you save an entry to Local History, it's stored only in this browser's local storage.
Yes, the Next Birthday Countdown panel shows a live-ticking countdown to your next birthday or any recurring anniversary.
Western zodiac uses standard date ranges, Chinese zodiac uses a 12-year animal cycle based on birth year (an approximation, since the exact Lunar New Year cutoff varies slightly by year), and generation is based on commonly used birth-year ranges.
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