Lacalm is a former commune in the Aveyron department in southern France. On 1 January 2016, it was merged into the new commune of Argences-en-Aubrac. Lacalm is located northwest of the plateau of Aubrac, in contact with the Viadène on Lebot river. Its area is 2649 hectares ( 26.49 km2 ) with an altitude between 981 meters and 1284 meters.