To calculate the compound number of a person, his birth or root number, name number
and pyramid numbers are added to get a single digit eventually.

Suppose that, a person has 1, 7, 5 and 9 as his root, luck, name and compound numbers respectively.

To calculate to his compound number, all these numbers are added together.

1+7+5+9= 22=2+2=4

Hence, the person in question has a compound number 4.