Greek Gematria (Isopsephy) Calculator

Article — Greek Gematria (Isopsephy) Calculator

Greek gematria (isopsephy) calculator: Milesian numeral values

Greek gematria — technically called isopsephy from the Greek for “equal pebble-count” — assigns each of the 27 Milesian numeral letters a numerical value and sums them for a word. Alpha = 1, beta = 2, gamma = 3, all the way through omega = 800 and sampi = 900. This calculator strips accents automatically (ancient Greek had none), recognises final-sigma (ς) as identical in value to standard sigma (σ), and shows the per-letter breakdown.

The Milesian system was the standard Greek number notation from roughly the 6th century BCE until well into the Byzantine era. Letters doubled as numerals, just as in Hebrew. Writing a number meant writing letters; reading a name automatically gave you a number. This dual function is what made isopsephy a natural and widespread practice in the Greek-speaking world.

What is Greek gematria?

Greek gematria is the practice of computing the numerical sum of a Greek word using the Milesian numeral system. The word “agape” (αγαπη, “love”) sums to 1 + 3 + 1 + 80 + 8 = 93. The name “Jesus” in Greek (Ιησους) sums to 10 + 8 + 200 + 70 + 400 + 200 = 888.

The technique appears in classical Greek mathematics (Apollonius of Perga), in Hellenistic magic papyri, in early Christian texts (the “number of the beast” in Revelation), and in graffiti from Pompeii. It is the direct counterpart of Hebrew gematria, using the same letter-to-number method on a different alphabet.

The Milesian numeral system

Greek had two numeral systems. The older “acrophonic” system used letter initials (Π for pente = 5, Δ for deka = 10, Η for hekaton = 100). The Milesian system, named for Miletus where it likely originated, used the alphabet itself: each letter took a specific numerical value.

The Milesian system needed 27 letters to cover units 1–9, tens 10–90, and hundreds 100–900. The classical Greek alphabet had only 24 letters, so three archaic letters were retained purely for their numerical values: stigma (6), qoppa (90), and sampi (900). These three are not used in modern Greek writing — only in numeral contexts.

Greek gematria units, tens, hundreds

Each group is called an ennead (a group of nine). The system is positional in spelling but additive in calculation: to write 384 in Milesian numerals you would write τπδ (tau-pi-delta) = 300 + 80 + 4. To compute the gematria of a word, you sum all the letter values in the same way.

Archaic letters: stigma, qoppa, sampi

The three archaic numerals deserve special mention because most modern Greek-speakers do not recognise them.

Stigma (&stigma;, value 6): Originally a ligature of sigma and tau (στ), historically related to the older letter digamma (&Digamma;) which represented the ‘w’ sound and dropped out of classical Greek phonology. In medieval and modern numeral usage, stigma fills the 6 slot. Some manuscripts use digamma instead.

Qoppa (&qoppa;, value 90): An archaic letter related to the Phoenician qoph, ancestor of the Latin Q. Dropped from classical Greek but kept as a numeral. Modern fonts often render qoppa as a curved Q-like shape.

Sampi (&sampi;, value 900): The closing letter of the Milesian numeral system. Used only for the value 900; never appears in regular Greek text. Some manuscripts use a different glyph (a tau on top of an iota), but the function is the same.

Greek gematria in Christian texts

The New Testament was written in Koine Greek, and isopsephy appears explicitly in Revelation 13:18: “Let him that hath understanding count the number of the beast: for it is the number of a man; and his number is six hundred threescore and six” (666 in the original Greek χξ&stigma;′).

The most widely accepted scholarly identification is that 666 encodes Nero Caesar transliterated into Hebrew letters (nun + resh + vav + nun + qof + samekh + resh) = 50 + 200 + 6 + 50 + 100 + 60 + 200 = 666. Some early manuscripts give 616 instead, which corresponds to the Latin spelling “Nero” (no terminal n) in Hebrew. Either way, the text appears to use isopsephy to encode the name of a Roman emperor without naming him explicitly — a common safety measure under imperial rule.

Famous Greek gematria values

The Sibylline Oracles (a Jewish-Christian text from the 2nd century CE) explicitly play with isopsephy. Book 1, line 326: “Then will come from heaven the great man whose hands have been nailed to the cross… whose name has the sum of the first numeral.” The cryptic reference is to 888 (Iesous).

Greek gematria vs Hebrew gematria

Same method, different alphabets. Both systems use letters as numerals; both sum letter values for a target word; both have served religious, magical, and literary purposes.

The differences are technical. Hebrew has 22 letters in the standard alphabet plus 5 final forms; Greek has 24 standard letters plus 3 archaic numerals (27 total). Hebrew gematria runs 1–400; Greek isopsephy runs 1–900. Hebrew gematria has multiple named systems (Hechrechi, Siduri, Katan, Atbash, Albam); Greek isopsephy mostly uses just the Milesian sum, sometimes with an “ordinal” variant assigning A=1, B=2, …, Ω=24.