QTM may refer to:
QTM, a radiotelephony navigational Q code Quantity theory of money Quantum Turing machine quarter turn metric, a measurement used in puzzle cube analysis, see Optimal solutions for Rubik's Cube quaternary triangular mesh, a method to build a geodesic grid Quantum Corporation (NYSE stock ticker: QTM), see Companies listed on the New York Stock Exchange (Q) Quantum Air (IATA airline code: QO; ICAO airline code: QTM)