Mewa
The nine magic Mewa square numbers represent the nine categories of astrological spirits. Each number has an interpretation that includes karmic relations from past life to future lives.
The Yearly Mewa, Bame, changes every year.
The Birth Mewa for the birth year, Keme, stays throughout one's life
In a primary state of nine magic square numbers, whether one adds horizontally, vertically or diagonally, the sum of any line is 15.
Each Mewa has its own element and its own colour:
| Number | Element | Colour |
| 4 | Wood | Green |
| 7, 9 | Fire | Red |
| 5 | Earth | Yellow |
| 1, 6, 8 | Iron | White |
| 2, 3 | Water | Blue |
The Chinese used the colour black for water in the old text and blue for wood.
Mewa of an animal sign
Mewa numbers are always connected to the same animals.
For example, the Mewa for a Mouse is always 1, 4 or 7.
| 1 | |
| 4 | Mouse, Rabbit, Horse, Bird |
| 7 |
| 2 | |
| 5 | Tiger, Snake, Monkey, Pig |
| 8 |
| 3 | |
| 6 | Ox, Dragon, Sheep, Dog |
| 9 |
Lag rTsis hand calculation
A Tibetan astrologer uses his/her own hand to calculate the Mewa in relation to each other.
