Pythagorean numerology
Pythagorean numerology is the Western system that values letters 1 to 9 in alphabetical order, so A is 1, I is 9 and J starts again at 1. It gives the Life Path, Destiny, Soul Urge and Personality numbers.
Also known as: western numerology, pythagorean system
This is the numerology most Western books use. It is named after Pythagoras, the Greek philosopher of the sixth century BCE who taught that number underlies everything. The modern method, however, took shape in the early twentieth century, notably through the American writer L. Dow Balliett.
Letters are numbered in order and the count restarts after 9: A, J and S are 1; B, K and T are 2; C, L and U are 3; and so on, up to I and R at 9. Totals are reduced to one digit, except the master numbers 11, 22 and 33.
From your full birth name and date it produces the core numbers: the Life Path (date of birth), the Destiny or Expression (all letters), the Soul Urge (vowels) and the Personality (consonants). Further numbers, such as the Personal Year, describe timing.
There is no evidence that Pythagoras used this letter chart; the name honours his ideas rather than his method. In India it is common to read the core profile with Pythagorean values and to check name spellings with the Chaldean table.