A little context for everyday curiosity
Chinese Age Calculator
Compare the age counted by birthdays with traditional nominal age, using the lunar calendar boundary.
Enter a birth date to compare age systems.
Enter a birth date to compare age systems.
Nominal-age conventions vary by region, family, and context. International age is standard in most official contexts.
How this is calculated
International age counts completed birthdays. Traditional nominal age compares lunar years and starts at one, so the result can differ by one or two years.
See how the calendar begins with Lunar New Year.
Frequently asked questions
- What is international age?
- International age is the number of completed years since your last birthday.
- What is traditional nominal age?
- Traditional nominal age counts the birth year as age one and increases at Lunar New Year; usage varies by region and family.