Lunar Age Calculator
Calculate your Chinese lunar age used in the traditional gender prediction chart.
What is Lunar Age?
Lunar age (also called Chinese age or nominal age) is a traditional East Asian age counting system that differs from the Western method. In this system:
- A baby is considered 1 year old at birth, accounting for time spent in the womb
- Age increases by one year at each Chinese New Year, not on your birthday
- This means lunar age is typically 1-2 years older than Western age
How is Lunar Age Calculated?
The calculation depends on whether you were born before or after Chinese New Year in your birth year:
If born BEFORE Chinese New Year:
Lunar Age = Western Age + 2
If born AFTER Chinese New Year:
Lunar Age = Western Age + 1
Why Does Lunar Age Matter for Gender Prediction?
The Chinese Gender Calendar traditionally uses lunar age, not Western age. Using the wrong age system would give different results. Our main calculator handles this conversion automatically when you enter dates.
The traditional chart covers lunar ages from 18 to 45. If your lunar age falls outside this range, the chart cannot make a prediction.
Ready to check the gender prediction?
Use the Gender Calculator