BTT

BTT may refer to:


 * Bhutan Time, UTC+6 hours
 * Brazilian Top Team, Brazilian mixed martial arts academy
 * Bettles Airport, IATA code
 * Banking Transformation Toolkit, part of IBM websphere
 * Banking Transaction Tax, A form of tax on cash withdrawal & other bank transactions in India
 * Bayerische Theatertage, theatre festival in Germany
 * Betrayal trauma theory