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 & MSD Partners, an American 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