BDT may refer to:

• Baker Dearing Educational Trust, educational charity in the United Kingdom
• Ballistic deflection transistor, electronic devices for high-speed integrated circuits
• Bangladeshi taka (ISO 4217 code), the currency of Bangladesh
• Bangladesh Standard Time, sometimes abbreviated BDT to distinguish from British Standard Time (BST).
• BDT Capital Partners, a merchant bank
• The Best Damn Thing, a 2007 album by Avril Lavigne
• Black–Derman–Toy model, a short rate model in mathematical finance
• Bokoto language (ISO 639-3 code), a Gbaya language of the Central African Republic
• Bolshoi Drama Theater (Russian: Большой Драматический Театр имени Г. А. Товстоногова; БДТ), a theater in Saint Petersburg, Russia
• British Dependent Territories, former designation of British Overseas Territories
• Gbadolite Airport (IATA code), Gbadolite, DR Congo