// Workers AI · dad joke modeIs F1 in a relationship? It's always shifting gears.

F1 is Formula One, the highest class of auto racing sanctioned by the FIA.

F1, F01, F.I, F.1 or F-1 may also refer to:

Military craft and weapons

F1 grenade (disambiguation), several types of hand grenade
F 1 Hässlö, a former Swedish Air Force wing
F1 SMG, an Australian submachine gun
Dassault Mirage F1, a French combat aircraft
FCM F1, a 1940 French super-heavy tank
Fokker F.I, a German fighter triplane
HMS F1, an F-class submarine of the Royal Navy, launched in 1915
HMS Kelly (F01), a 1938 British Royal Navy K-class destroyer
Kampfgeschwader 76, from its historic Geschwaderkennung code with the Luftwaffe in World War II
Mitsubishi F-1, a fighter/attack aircraft of the Japan Air Self-Defense Force
North American F-1 Fury, the FJ known as the F-1 from 1962 onward
Sopwith Camel F.1, a 1916 British World War I single-seat fighter biplane
USS F-1 (SS-20), an F-class submarine of the United States Navy
Felixstowe F.1, a Seaplane Experimental Station-designed flying boat
Fokker F.I (1919), an abortive design that served for the 1916 Fokker F.II airliner construction
Avion MAI F-1, a sporting biplane
FR F1, a French precision rifle

F-1 cubesat, a picosatellite developed in Vietnam
F1 hybrid, a first-generation hybrid (or crossbreed) animal or plant
F1-isoprostane, a type of isoprostane
F₁ layer, a layer of the ionosphere
F1 score, a statistical performance measure of a test or classifier
Vascular dementia's ICD-10 code
F1, a tornado intensity rating on the Fujita scale
f₁, the formant with the lowest frequency in acoustics and phonetics
F-1 (nuclear reactor), the oldest operating research reactor
NIST-F1, a cesium fountain clock and the United States' primary time and frequency standard
F₁, the field with one element

BMW F01, an automobile platform
BYD F0 or BYD F1, a car manufactured by BYD Auto
F1, the project codename and development designation of the first Lexus vehicle
Ford F-Series, includes the F-1 pickup truck
Finnish Steam Locomotive Class F1
F-01 (Michigan county highway)
F1 Taksim–Kabataş funicular line, a railway line in Istanbul, Turkey
McLaren F1, a sports car
NCC Class F1, a Northern Counties Committee Irish steam locomotive
Rocketdyne F-1 rocket engine
SECR F1 Class, a South Eastern and Chatham Railway, British steam locomotive
SP&S Class F-1, an American steam locomotive class, of the Spokane, Portland and Seattle 700
SpaceX Falcon 1 space launch rocket
Manly ferry service in Sydney, Australia known as the F1

F-1 visa, a visa category to enter United States as a student
Foundation Year 1, the first year of the UK Foundation Programme for postgraduate medical practitioners
f¹, Family 1, a group of Greek gospel manuscripts