Nominal age · 虚岁 · UTC+8
Chinese Age Calculator: Your Lunar Age (虚岁) Today
Chinese lunar age starts at 1 at birth and increases at Chinese New Year. Enter a birth date to find your nominal age today or on another date.
Your age on 14 September 2026
5 sui · lunar age
4 completed Gregorian years.
Lunar year 2026 − birth lunar year 2022 + 1 = 5.
Your next lunar-age change is Chinese New Year, 6 February 2027: 6 sui.
Find this birth date’s lunar birthdays →How Chinese lunar age is counted
Start at one on the day of birth. Add one each Chinese New Year, when lunar month one begins. The formula is the comparison date’s lunar year minus the birth date’s lunar year, plus one. January and early-February dates can still belong to the preceding lunar year.
Why “your age + 1” can give the wrong answer
Take someone born on 12 April 1990. Their Chinese age changes at New Year, while their completed age changes on their birthday. These three dates show why the two counts can be either one or two years apart.
Before Chinese New Year
36 sui · lunar age
35 completed Gregorian years.
2025 − 1990 + 1 = 36 sui
Chinese New Year
37 sui · lunar age
35 completed Gregorian years.
2026 − 1990 + 1 = 37 sui
Gregorian birthday
37 sui · lunar age
36 completed Gregorian years.
2026 − 1990 + 1 = 37 sui
On 17 February 2026, this person is 35 completed years old but 37 sui. Adding one to their completed age would give 36, which misses the New Year increment. On their birthday, completed age catches up by one; lunar age stays the same.
Which dates should I enter?
Enter your Gregorian birth date in the first field. In “Age on this date”, use today for your current lunar age, or the date of the event you are checking. The calculation uses the lunar years containing those two dates—not just their Gregorian year numbers.
If you only know a lunar birth date, convert it to Gregorian first. Keep the leap-month setting: a regular month and a leap month with the same number are different birth dates.
Lunar age and your birthday
A Gregorian birthday increases completed years; a lunar birthday repeats the lunar month and day. Neither date is the annual change in nominal age: everyone using this count adds one at Chinese New Year. Lunar age is usually one or two ahead of completed years.
Does a leap month add another year of age?
No. A leap month is an extra month within the same lunar year, not another New Year. Nominal age therefore does not increase when that leap month begins. A lunar birthday in a leap month is a separate recurrence question; it does not change the age formula.
Which age does the Chinese gender calendar use?
The Chinese gender calendar uses the mother’s nominal lunar age on the conception date to choose a row from 18 to 45. The conception date’s lunar month selects the column. Set “Age on this date” to the conception date to find that row.