E12 or E-12 may refer to:

Science, technology and mathematics[edit]

• the E12 series of preferred numbers
• E12 screw, a type of Edison screw
• the code name for Microsoft Exchange Server 2007
• Siding Spring Survey code

Transport[edit]

Roads and trails[edit]

• European route E12
• E12 European long distance path
• Ampang–Kuala Lumpur Elevated Highway (AKLEH), a fully elevated expressway in Kuala Lumpur, Malaysia

Vehicles[edit]

• BMW E12
• HMS E12, a United Kingdom Royal Navy submarine which saw service during World War I
• Spyker E12, a Dutch Spyker car

Other uses[edit]

• Queen's Indian Defense, Encyclopaedia of Chess Openings code
• E12, a postcode district in the E postcode area
• E-12 equal temperament consisting of twelve equal semitones per octave

See also[edit]

• All pages with titles beginning with E-12
• All pages with titles beginning with E12
• All pages with titles containing e-12
• All pages with titles containing e12
• 12E (disambiguation)