Reduction (also called Full Reduction or Pythagorean) reduces each letter's ordinal value to a single digit, then sums those digits. A=1, J=1, S=1; B=2, K=2, T=2; etc.
Digit-sum each ordinal · A = 1, J = 1, S = 1 …About this cipher
Reduction is the bridge between gematria and Pythagorean numerology. The technique is the same as the Hebrew Mispar Katan ('small count') applied to the English alphabet — every letter's contribution is reduced to 1–9.
Because the per-letter values are small, Reduction totals are also small. This makes equal-sum matches more frequent and is part of why the decoder community considers Reduction one of the more 'lively' ciphers — patterns surface easily.
Worked example
Input: TORAH
Result: 26
T (20 → 2) + O (15 → 6) + R (18 → 9) + A (1) + H (8) = 2 + 6 + 9 + 1 + 8 = 26. Digital root: 2 + 6 = 8.
Frequently asked
Is Reduction the same as Pythagorean numerology?
It uses the same per-letter values (A=1, B=2, …, I=9, J=1, K=2, …) but is summed across the whole word rather than treated per-letter. The numbers are the same; the framework around them differs.
What's the Hebrew equivalent of Reduction?
Mispar Katan — the classical 'small count' that reduces each Hebrew letter to a single digit (Aleph=1, Yud=1, Qof=1; Bet=2, Kaf=2, Resh=2; etc.).
Why are Reduction totals so small?
Because every letter contributes at most 9. So a 5-letter word has a maximum Reduction value of 45.