Formula racing is any of several forms of open-wheeled single-seater motorsport. The origin of the term lies in the nomenclature that was adopted by the FIA for all of its post-World War II single-seater regulations, or formul. The best known of these formul are Formula One, Formula Two, and Formula Three. Common usage of 'formula racing' encompasses other single-seater series, including the GP2 Series, which replaced Formula 3000 (which had itself been the effective replacement for Formula Two). Categories such as Formula Three and GP2 are described as feeder formul, which refers to their position below Formula One on the career ladder of single-seater motor racing. There are two primary forms of racing formula: the open formula that allows a choice of chassis and/or engines; and the control or 'spec' formula that relies on a single supplier for chassis and engines. Formula Three is an example of an open formula, while Formula BMW is a control formula.
Contributions by Adrian M. H., Liftarn, and Ginsuloft.