THM

THM, Thm, thm or ThM may refer to:


 * Turbo-Hydramatic, GM vehicle transmission
 * Ton of heavy metal in a nuclear power plant
 * Ton of hot metal in the steel industry
 * Trihalomethanes in chemistry
 * Therm, a unit of heat energy
 * Technische Hochschule Mittelhessen—University of Applied Sciences
 * Master of Theology postnominal, ThM