Chaldean numerology

Where it comes from

The system is named after the Chaldeans of ancient Babylon, though the table in circulation today reached the West through nineteenth-century occult writing rather than any surviving Babylonian document. Its actual pedigree is much shorter than the name implies — worth knowing, given how often it is sold as the more ancient and therefore more authentic option.

The missing nine

No Chaldean letter is worth 9. The number was treated as sacred and held apart from ordinary correspondence, so it enters a reading only as a total. When a Chaldean name adds up to 9, that 9 was produced by the sum — never carried in by a single letter.

Why the results differ

Take any name and the two systems will usually disagree, because the tables agree on only ten of the 26 letters — A to E and J to N. In Pythagorean, S is 1 and C is 3; in Chaldean, both are 3. Neither is checkable against reality, so the honest position is that you are choosing a convention, not discovering a fact.

On real names the gap is wide. Among US babies given a top-1,000 first name, only about 9% get the same Expression number from both tables. Two tables with nothing in common would agree by chance on about 9%.

See both tables side by side →

Compound numbers

Chaldean practice, as popularized by the palmist Cheiro in his Book of Numbers (1926), reads a total before reducing it. A name that adds up to 38 is read first as the compound number 38 and only then as its root, 11. The single digits describe the outward character; the compound numbers from 10 to 52 were said to show the hidden influences behind it. Pythagorean numerology reduces straight away and has no equivalent layer.

Which name the Chaldean system uses

Here the two systems part company again. Pythagorean numerology traditionally takes the full name on the birth certificate. Chaldean practice takes the name you are actually known by — the one people use when they call you — on the reasoning that its sound is what carries the vibration. A nickname used every day can therefore count for more than a middle name nobody says.