How the life path is calculated, and why sites disagree
Published 05/09/2026 · 1 min read
The same birthday can produce two different life path numbers on two different sites. The cause is one detail in the addition — and one method is better founded.
The life path comes from the Gregorian date of birth. But two methods of adding are in circulation, and they do not always agree.
Summing every digit at once
This method throws all the digits together and reduces. For 25/12/1990: 2+5+1+2+1+9+9+0 = 29, then 2+9 = 11. Simple, but it discards the structure of the date.
Reducing each component first
This one reduces day, month and year separately before adding. Same example: month 12 becomes 3, day 25 becomes 7, year 1990 becomes 1. Then 3+7+1 = 11. Here they agree, but for many dates they do not.
Thấu Mình uses the component method, because that is what the mainstream Pythagorean sources use — and because it preserves master numbers 11, 22 and 33 inside the components.
The detail most often missed: master numbers in a component
If you were born on the 22nd, the 22 stays 22 in the sum rather than reducing to 4. That changes the total, and it is the most common reason two sites disagree. Our result page shows the full working so you can check it yourself.