Summa de arithmetica

Summa de arithmetica, geometria, proportioni et proportionalita

Title page of the second (1523) edition
Author	Luca Pacioli
Language	Italian
Subjects	Mathematics, Accounting
Publisher	Paganini (Venice)
Publication date	1494
Publication place	Republic of Venice
Pages	615 pp (first edition)

Summa de arithmetica, geometria, proportioni et proportionalita (Summary of arithmetic, geometry, proportions and proportionality) is a book on mathematics written by Luca Pacioli and first published in 1494. It contains a comprehensive summary of Renaissance mathematics, including practical arithmetic, basic algebra, basic geometry and accounting, written for use as a textbook and reference work.

Written in vernacular Italian, the Summa is the first printed work on algebra, and it contains the first published description of the double-entry bookkeeping system. It set a new standard for writing and argumentation about algebra, and its impact upon the subsequent development and standardization of professional accounting methods was so great that Pacioli is sometimes referred to as the "father of accounting".