B8, B VIII or B-8 may refer to:

Transport

Roads B8 (Croatia), an expressway part of the Istrian Y highway network B8 road (Cyprus) B8 road (Kenya) B8 road (Namibia) Bundesstraße 8, a road in Germany

Other uses in transport B8 (New York City bus) serving Brooklyn Bavarian B VIII, a German steam locomotive model Bensen B-8, a 1955 United States small single-seat autogyro , a B-class submarine of the Royal Navy Mazda B8, a piston engine Fokker XB-8, a bomber prototype built for the United States Army Air Corps B8, the IATA code for Eritrean Airlines LNER Class B8, a class of British steam locomotives Denza B8, a Chinese plug-in hybrid full-size SUV

Biology Proanthocyanidin B8, a B type proanthocyanidin Vitamin B8, a name sometimes used for inositol HLA-B8, an HLA-B serotype

Other B8 (bronze), an alloy used in cymbals b8 (spam filter), a statistical spam filter implemented in PHP Boron-8 (B-8 or 8B), an isotope of boron B8, a type of stereoautograph A subclass of B-class stars An international standard paper size (62×88 mm), defined in ISO 216 The musical note 7 keys above a standard Grand Piano The postcode for Saltley, England B8, the category for warehousing under the United Kingdom planning regulations B-VIII, the Haigerloch research reactor, the final pile of the German nuclear weapons program

See also 8B (disambiguation)