TPI

TPI may refer to:

Medicine

 * Tehran Psychiatric Institute, an Iranian research institute
 * Tianyin Pharmaceutical, a Chinese pharmaceutical company
 * TPI test, used to detect presence of Treponema pallidum bacteria
 * Triosephosphate isomerase, an enzyme

Technology

 * Tire Pressure Indicator, a product by NIRA Dynamics AB
 * TPI Specialties, an American auto parts manufacturer
 * True Performance Index, a measurement for AMD processors
 * Teeth per inch, on a saw blade

Units of measure

 * Thread count, or threads per inch, used in the textile industry
 * Threads per inch, used with threaded fasteners
 * Tracks per inch, of magnetic storage media
 * Twist per inch, or turns per inch, used in the textile industry

Other uses

 * MNCTV, an Indonesian television network formerly named TPI (Televisi Pendidikan Indonesia)
 * Tangail Polytechnic Institute, in Bangladesh
 * Tapini Airport, in Papua New Guinea
 * Tarup-Paarup IF, a Danish association football club
 * Technique Polytechnic Institute, in West Bengal, India
 * Ted Petty Invitational, an independent wrestling tournament in North America
 * Third-party inspection company
 * Tibet Policy Institute, a think tank of the Central Tibetan Administration
 * Tok Pisin, a language of Papua New Guinea
 * Town Planning Institute, later the Royal Town Planning Institute, a professional organisation in the United Kingdom
 * TPI Polene, a Thai cement manufacturer
 * TPI theory, in human resource management
 * Trading Places International, an American vacation services corporation
 * Triebold Paleontology Incorporated, an American fossil company
 * Tube Products of India, an Indian steel manufacturer
 * Two person integrity, a communications security measure