Calculate your age using the traditional East Asian lunar calendar system used in China, Korea, and Vietnam.
Last updated: March 2026
👉 Quick Answer:
Your lunar age is based on the traditional East Asian age system, where you are considered one year old at birth and your age increases for everyone at the Lunar New Year — not on your birthday. This means your lunar age is usually 1–2 years higher than your Western age.
If you want a quick estimate without using the calculator:
⚠ This shortcut is approximate. For exact results (especially around birth dates and Lunar New Year timing), use the calculator above.
| System | Starts At | Age Increases |
|---|---|---|
| Western Age | 0 at birth | On your birthday |
| Lunar Age | 1 at birth | At Lunar New Year |
Your lunar age can be up to 2 years older than your Western age because:
Lunar age is still used in cultural contexts across China, Korea, and Vietnam, especially for traditions, zodiac signs, and social customs. However, most countries now use Western age for official purposes.
Lunar age (also called East Asian age reckoning) is a traditional age calculation system used in China, Korea, Vietnam, and other East Asian cultures. Under this system, a person is considered to be one year old at birth, and everyone's age increases by one year at the Lunar New Year, not on their individual birthday.
This means your lunar age can be 1-2 years older than your Western age, depending on whether the current Lunar New Year has passed and whether your birthday has occurred yet. This system was traditionally used for determining zodiac signs, fortune telling, and social customs.
Person born on June 15, 1990, checking age on March 19, 2026:
Step 1: Calculate Western age: 2026 - 1990 = 36 years (initial), then adjust to 35 because birthday (June 15) hasn't occurred yet in March
Step 2: Count Lunar New Years passed since birth:
Result: Western age is 35, Lunar age is 37 (difference of 2 years)
Lunar age counts from birth as year 1 and increases at Lunar New Year for everyone, while Western age starts at 0 and increases on individual birthdays.
While most East Asian countries now officially use Western age for legal documents, lunar age is still used in traditional contexts, fortune telling, and cultural practices. South Korea officially switched to Western age in 2023.
Yes! If you were born shortly before a Lunar New Year, you turn 2 years old (in lunar age) very quickly - 1 year at birth, then +1 at the upcoming Lunar New Year.
Lunar New Year (Spring Festival) falls between January 21 and February 20, varying each year based on the lunisolar calendar. It marks the first new moon of the lunar calendar.
Traditionally used in China (虚岁), Korea (한국 나이/만 나이), Vietnam (tuổi ta), and other East Asian cultures. Usage varies by region and context.
Your Chinese zodiac animal is determined by the year you were born in the lunar calendar. If you were born before that year's Lunar New Year, your zodiac is the previous year's animal.
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