cwt is the abbreviation for hundredweight (cwt = centum weight), an English, imperial, and US customary unit of weight.

CWT or cwt may also refer to:

Enterprises and organizations CWT (company), formerly Carlson Wagonlit Travel, a travel management company Cadwalader, Wickersham & Taft, a New York law firm California Water Service Group, a public utility (NYSE ticker symbol: CWT) Changing World Technologies, a synthetic fuel company Cheshire Wildlife Trust, an English charity Colorado Water Trust, an American non-profit Cooperatives Working Together, an American dairy organization Cornwall Wildlife Trust, an English charity Tanzania Teachers' Union (Swahili: Chama cha Walimu Tanzania)

Science and technology Center wing fuel tank (CWT), a crucial airplane structure that contributed to the crash of TWA Flight 800 Coded wire tag, an animal tagging device Complex wavelet transform, an extension to the standard discrete wavelet transform used in image processing Constant with temperature, a term used in bandgap voltage reference Continuous wavelet transform, a formal representation of a signal in mathematics CBOR Web Token, a proposed Internet standard for encoding JSON Web Token-style tokens in binary form

Other uses Kwatay language, spoken in Senegal (ISO 639 code: cwt) Cowra Airport, New South Wales, Australia (IATA code: CWT) Central Western Time, an Australian time zone Chief Water Tender, a former paygrade for a watertender in the U.S. Navy Constant weight, a freediving discipline