Methodology: How We Calculate and Verify
How every value on this site is defined, calculated and checked.
How values are defined
- Each cipher is defined by a letter table, shown on its page and on the chart page.
- The English ciphers are Ordinal (A=1 to Z=26), Reverse (A=26 to Z=1), Full Reduction (letters cut to 1 to 9) and Sumerian (Ordinal × 6).
- Hebrew uses the standard values Aleph=1 to Tav=400, with variants (Gadol, Katan, Siduri) on their own pages.
- Greek uses the 24 standard letters, Alpha=1 to Omega=800.
How values are calculated
Calculations run in your browser. Spaces, punctuation and, for Greek, accent marks are ignored. Letters outside the chosen script are skipped. The text you type is not sent to our servers.
How values are checked
- Worked examples on each page are generated by code from the same letter table and compared with a hand calculation.
- Values are calculated from the published letter tables, and worked examples are checked by hand before each update; pages show their last-updated date.
- Corrections are logged on the changelog.
How we check results
- Every letter table is written out in full on its page and on the chart page.
- Calculations run in your browser from those tables, so there is no hidden step.
- Example totals shown in tables and articles are generated by code from the same tables, and key examples are checked by hand.
- Relationships between ciphers are used as consistency checks: Reverse equals 27 times the letter count minus Ordinal, and Sumerian equals six times Ordinal.
- Anagrams must give identical totals in every additive cipher, which gives another test.
We do not claim that these checks make errors impossible. They make them findable, and we correct any we find.
Known limits
- English ciphers are modern conventions, with no historical authority.
- Hebrew spelling choices change totals, and the calculator uses the letters it is given.
- Greek calculation ignores accents and treats final sigma as 200.
- Chaldean totals follow the table on the Chaldean page and may differ from other sources that use variants.
Known limits
- There is no single standard for gematria. Other sites may use different rules for the same cipher name.
- Names of Hebrew methods vary between sources, so we show the letter table beside each.
- English ciphers are modern conventions, not ancient systems.
See also: About · Methodology · Editorial policy · Sources · Changelog · Contact