Numerology, explained properly

Eight long-form guides covering the parts of numerology that calculators cannot answer: how the arithmetic actually works, where the tradition comes from, where practitioners disagree, and what to do when two sites give you different numbers.

Everything here is written from scratch rather than compiled, every calculation shown can be reproduced by hand, and where we hold an opinion that differs from the numerology mainstream we say so rather than hiding it. If you find an error, tell us — corrections are made to the page, not buried.