UT1 is the principal form of Universal Time.

UT1 may also refer to:

Ultra Trencher 1, a submersible robot Toulouse Capitole University, formerly Université Toulouse 1, France UT1, one of the four Unit Telescopes making up the Very Large Telescope

UT-1 may refer to: Cadet UT-1, an American high-wing prototype glider Pershyi, formerly UT-1, a Ukrainian public television channel Utah's 1st congressional district Yakovlev UT-1 a training aircraft built in the Soviet Union UT-A1, or UT-1, a Urea Transporter

See also UT (disambiguation) UTI (disambiguation)