Gematria vs numerology

Two definitions

Gematria is the practice of assigning a numerical value to each letter of an alphabet, summing the letters of a word, and comparing words that share a sum. Numerology is the belief that numbers — derived from names, birth dates or events — carry meanings that describe character or foretell outcomes.

The difference is in what the number is for. In gematria the number is a bridge between two words: אליעזר and 318, ladder and Sinai. Once the second word is found, the number has done its work; nobody in the Talmud asks what 318 “means” in itself^{[1] Source: Gematria}. In numerology the number is the destination: a person is “a 7” or “an 11”, and a table of meanings for the digits 1–9 (plus the master numbers 11, 22 and 33) supplies the interpretation^{[4] Source: Numerology}.

Side by side

Where they overlap

The overlap is real but narrow, and it is worth being exact about it.

• The reduction chart. Numerology’s “Pythagorean” table — A = 1 … I = 9, then J = 1 again — is identical to the cipher this site calls Full Reduction. A numerologist’s Expression number for a name is that cipher’s total reduced to one digit.
• The Chaldean table. Cheiro’s 1–8 chart is used both as a numerology system and, on calculators like this one, as a cipher. The table is the same; what is done with the result differs.
• Digit roots. Both sometimes add the digits of a number until one remains (74 → 11 → 2). Gematria does it to find a second, coarser class of matches; numerology does it to reach the meaning table.

Everything else — Hebrew and Greek values, the full unreduced sums, birth-date arithmetic, master numbers, the meanings of the digits — belongs to one practice only.

Origins: ancient and modern

Gematria is old because its alphabets were numeral systems. Greek letters served as numbers from about the sixth century BCE, and a first-century Pompeian could scratch “I love her whose number is 545” on a wall^{[3] Source: Isopsephy}. The Hebrew term appears in the hermeneutic rules attributed to R. Eliezer ben Jose ha-Gelili around 200 CE, and the method was elaborated through the Talmud, the medieval commentators and the kabbalists^{[2] Source: Gematria}.

Numerology, in the sense of reading names and birth dates through a 1–9 chart, is modern. The Pythagoreans of the sixth century BCE certainly held that number underlies reality and attached qualities to particular numbers, but they left no letter table and did not read names^{[5] Source: Pythagoreanism}. The system called “Pythagorean” today was assembled in the early twentieth century, and the Chaldean system was fixed in its modern form by Cheiro’s Book of Numbers in 1926^{[6] Source: Cheiro’s Book of Numbers[4] Source: Numerology}. Its claim to Babylonian ancestry is a name, not a lineage; the Chaldean page has the details.

One name, both ways

Take “John Smith”. A gematria calculator reports its value in each cipher and stops: 116 in English Ordinal, 44 in Full Reduction, 35 in Chaldean. The interesting question for gematria is what other words share those values — and, for a name, usually nothing follows from the answer.

A numerologist takes the same letters and produces a profile:

Every figure in that table is real arithmetic, produced by the same engine that runs the calculator. What numerology adds is the next step — that a 8 is such-and-such a kind of person — and that step is where the two practices part company entirely. Gematria has no meaning table. It never says what 74 is like.

What each claims to show

Classical gematria claims little. The Mishnah ranks it among the “side-dishes of wisdom”^{[7] Source: Pirkei Avot 3:18}; its results are offered as illustrations of a reading, not as facts about the world, and the mainstream commentators treated attempts to prove things by it with suspicion^{[1] Source: Gematria}. When a modern “decoder” uses gematria to predict an event, they are doing something the tradition never did.

Numerology, by contrast, is a set of claims about people and outcomes, and can be judged as such. No controlled study has found that Expression or Life Path numbers predict anything about a person that the name and date do not already reveal, and the same base-rate problem that affects gematria matches applies here: with nine possible outcomes, every profile fits a ninth of humanity. The accuracy page works through the statistics for letter-sums; the reasoning transfers directly.

Which one do you want?

• You want the number of a word, name or verse — in Hebrew, Greek or English — and to see which other words share it. That is gematria. Use the calculator; every cipher is labelled and sourced.
• You want your Expression, Soul Urge or Personality number. Type your name (or its vowels or consonants) into the Pythagorean calculator and reduce the result. The arithmetic is identical; what you make of it is up to you.
• You want your Life Path number. Add the digits of your birth date until one remains. No letters are involved, so no gematria calculator is needed.
• You want to know what a number “means”. Be aware that the meaning tables of numerology are modern conventions with no equivalent in gematria. For what particular numbers signify historically — 18, 26, 666, 888 — see the number meanings page.