A single digit worked out from your whole date of birth, how the sum is done, what the numbers are held to mean, and where the master numbers fit.
A life path number is a single digit from 1 to 9, or one of the three master numbers 11, 22 and 33, produced by adding up every digit of your date of birth and reducing the total. It is the central figure in modern Western numerology, and it needs nothing except the date: no hour, no city, no chart.
Reducing means adding the digits of a number together and repeating until one digit is left. That single operation is all the arithmetic the system uses. The standard method reduces the day, the month and the year separately, then adds the three answers and reduces once more. Take 17 March 1994.
The life path for that date is 7. You will also see a shortcut in which all the digits go into one pile: 1 plus 7 plus 3 plus 1 plus 9 plus 9 plus 4 gives 34, and 34 gives 7 as well.
The two routes agree on the final digit every single time, for a reason worth knowing. Repeatedly summing digits is the same as taking the remainder after dividing by nine, with nine standing in for a remainder of zero, and that remainder does not care how you group the addition. The order of the parts makes no difference either, so it is irrelevant whether your country writes the day first or the month first. The only thing the shortcut can lose is a master number that would have appeared partway through.
When a total lands on 11, 22 or 33, most practitioners leave it alone instead of reducing it to 2, 4 or 6. The convention is that these carry the meaning of the smaller number at a higher pitch and a higher cost, so the qualities are the same ones under more pressure.
Take 20 July 2000. July gives 7, the day 20 reduces to 2, the year 2000 reduces to 2, and 7 plus 2 plus 2 is 11. Left standing, that is a life path 11 rather than a life path 2.
A total of 33 is much rarer, and the reason is arithmetic. Three single digits cannot add up past 27, so at least one of the three parts has to be a master number already. On 7 April 1975 the year sums to 22 and is kept, the month gives 4 and the day gives 7, so the total is 33. Not every numerologist recognises 33, and plenty of books use only 11 and 22.
Descriptions vary a little from one writer to the next, but the family resemblance is strong.
Nine sharply drawn categories plus three variants is not much to memorise, which is a good part of why the system travelled so widely.
Everything rests on the recorded civil date, so it is worth checking the one you are using. Births in the small hours are occasionally registered on the neighbouring day, and a birth abroad may be logged in local time while the family remembers it in the time back home. Either slip moves the day by one and can change the final digit.
The system also assumes the Gregorian calendar. A date converted from another calendar produces a different set of digits and therefore a different number, and numerology offers no rule for deciding which of the two should win. Nothing else about you enters the calculation. Numerologists do read other figures, such as the expression number taken from the letters of a full birth name, but those are separate workings with their own methods and they do not feed into this one.
The idea that numbers carry qualities as well as quantities is usually traced back to the Pythagoreans, though the particular system sold today was assembled far more recently. The links between a digit and a character trait are conventions handed down inside the practice. No study has shown that people whose birth dates reduce to 8 end up with more authority than anybody else, and numerology does not have a mechanism to offer.
There is a reading effect worth naming too. Personality profiles written in broad terms are recognised as accurate by almost everyone who reads them, including by people who were handed the profile belonging to a different result. A life path description lands for that reason before it lands for any other.
What survives all that is a decent prompt. Read the number your date gives you and pay attention to which lines you want to argue with, because the sentences that irritate you usually tell you more than the flattering ones. Use it to ask a better question about how you work, and leave the predictions where you found them.


