Write your full date of birth in numbers
Add all the digits together
Keep adding the digits of the result until you get a single digit
If the result is 11, 22, or 33, some numerology systems keep it as a master number
Example: 14/08/1992
1 + 4 + 0 + 8 + 1 + 9 + 9 + 2 = 34
3 + 4 = 7
The birth number is 7