Hebrew Gematria

The twenty two letters of the Hebrew alphabet carry fixed numeric values in their traditional order: the first nine letters, Aleph through Tet, run 1 to 9; the next nine, Yod through Tzadi, run 10 to 90 in steps of ten; and the final four, Kof through Tav, run 100 to 400 in steps of one hundred. Five letters take a different shape when they end a word, the final or sofit forms, and some systems extend the table for these to 500 through 900 rather than reusing the values of their ordinary forms, a choice that produces different totals for the same word depending on which convention a given calculation follows.

Mispar hechrachi, standard value, is simply the sum of a word's letters read this way, and it is the technique behind gematria's best known results, including the frequently cited equivalence of the word chai, life, with the number eighteen, which is why multiples of eighteen became a customary sum for charitable giving in Jewish practice. Other named techniques vary the arithmetic: mispar gadol keeps the extended sofit values for every calculation; mispar katan drops the tens and hundreds and reduces every letter to its ones digit; and notarikon and temurah work by acronym and letter substitution rather than summation, treating the alphabet as raw material for wordplay as much as for arithmetic.

Gematria is old in a way the Pythagorean and Chaldean letter systems are not. Reading numeric equivalence between Hebrew words as meaningful appears already in Hellenistic era Jewish interpretation, where a shared numeric total between two scriptural terms could be treated as evidence of a hidden connection the plain text did not state outright, a technique that runs alongside similarly aged practices in the Greek speaking world, where isopsephy performed the same operation on the Greek alphabet.

The technique found its fullest theoretical home centuries later within Kabbalah, the medieval and early modern Jewish mystical tradition, where Sefer Yetzirah, the Book of Creation, treats the Hebrew letters themselves, and by extension their numeric values, as the building blocks God used to create the world, giving gematria a cosmological rather than merely interpretive weight. Later Kabbalistic commentary elaborated the technique considerably, and it drew the attention of Christian scholars of Hebrew mysticism during the Renaissance, among them Johannes Reuchlin, whose engagement with Kabbalistic method helped carry gematria into wider European esoteric currents well outside its Jewish origin, where it continues to circulate today in a much looser and more eclectic form.

Sources Sefer Yetzirah: The Book of Creation in Theory and PracticeAryeh Kaplan with De Arte Cabalistica (On the Art of Kabbalah)Johann Reuchlin, Encyclopaedia Judaica, 2nd editionMichael Berenbaum and Fred Skolnik (eds.)