Age & Chinese Zodiac Calculator
Exact age in years, months, and days with Chinese zodiac, stem-branch year, star sign, next birthday countdown, and day milestones.
This tool runs entirely in your browser. Your input is never uploaded.
Runs locally — the date never leaves this page.
Exact age, down to the day
Enter a date of birth and get a calendar-exact age — years, months, and days with proper month-end borrowing — plus totals: days lived, weeks, and hours. The calculation runs live in your browser; the date is never stored or sent anywhere.
Chinese zodiac with the lichun boundary
The zodiac animal and stem-branch year (for example 甲辰年) follow the folk-standard lichun (立春) boundary: birthdays before early February belong to the previous ganzhi year, and the page says so when that applies. Western star sign is computed from the solar calendar month and day.
Birthday countdown and milestones
See how many days until the next birthday and which weekday it falls on (a Feb-29 birthday celebrates on Feb 28 in common years). Day milestones — 10,000, 20,000, and 30,000 days — show their exact dates with passed/upcoming status.
An invalid or future date is rejected with a clear message. Everything runs locally.
Related tools
Date Calculator
Find how many days, weekdays, weeks, months, or years are between two dates, and add or subtract time from any date.
Open ToolWorld Clock and Time Zone Converter
Compare current time across cities and convert any moment between time zones.
Open ToolUnix Timestamp Converter
Convert between Unix timestamps, local dates, and UTC.
Open Tool