Arithmancy (class)

Arithmancy
Class information
Professor	Septima Vector
Classroom	Classroom 7A
Required textbooks	Numerology and Grammatica

"Oh, it's wonderful! It's my favourite subject!"

— Hermione Granger

Arithmancy is a Hogwarts subject taught by Professor Septima Vector. It comes from the Greek arithmo, meaning "number" and mancy, meaning "prophecy." This subject is taught in Classroom 7A, on the Castle's seventh floor. It is Hermione Granger's favourite subject and involves complicated number charts, but nothing else is known about the subject.

Class Information

Arithmancy is described as the branch of magic that deals with numbers, exploring their magical properties. Bridget Wenlock was mentioned as a famous Arithmancer, "First to discover the magical properties of the number seven", clearly supporting the previous theory. Also, one of the textbooks used in this class is Numerology and Grammatica: numerology, as the esoteric and magical study of number, and grammatica, as grammar in Latin language, suggesting a connection between words and numbers.

Textbooks

• Numerology and Grammatica

Known Professors

The Arithmany teacher, Septima Vector.

• Septima Vector

Known O.W.L.s

• Hermione Granger
• Percy Weasley
• Bill Weasley
• Barty Crouch Jr.
• Septima Vector (presumably)
• Bridget Wenlock (presumably)

Behind the scenes

• In Harry Potter and the Order of the Phoenix, Hermione mentions Arithmancy telling Ron that she passed.
• Hermione also mentions the subject a lot of times in Harry Potter and the Prisoner of Azkaban. She says that she signed up for Arithmancy and constantly refers to it. -J.K. Rowling has said that Arithmancy is "predicting the future with numbers."