TPI

TPI may refer to:

• Threads per inch, a measure used with threaded fasteners and woven fabrics
• Thread count, or threads per inch, a measure of the number of threads in an inch of fabric
• Twist per inch, or turns per inch, a measurement used in the yarn industry
• Tracks per inch, a measure of tracks a floppy disk controller can use within a linear one-inch space
• Tok Pisin (ISO 639 code), a language of Papua New Guinea
• Tire Pressure Indicator, a product by NIRA Dynamics AB
• Triosephosphate isomerase, an enzyme
• True Performance Index, a measurement for AMD processors
• Two person integrity, a security measure requiring the presence of two authorized individuals at all times
• TPI test, used to detect presence of Treponema pallidum bacteria
• The Town Planning Institute, later the Royal Town Planning Institute, a professional organisation in the United Kingdom
• The Ted Petty Invitational, an annual wrestling tournament held by IWA:Mid-South to honor the late Ted Petty (Rocco Rock)
• MNCTV, formerly TPI (Televisi Pendidikan Indonesia) until 2010, private television station in Indonesia
• TPI Specialties, an auto parts manufacturer
• TPI Polene, Thai cement manufacturer
• Trading Places International, an California-based vacation services corporation
• Tehran Psychiatric Institute