EMT stands for Electrical Metallic Tubing (aka thin-wall tubing). EMT is often used as a lower cost solution to galvanized rigid conduit (GRC). EMT is not threaded but can be used with threaded fittings via the use of clamps. EMT is typically made of steel.
The EMT Conduit Calculator estimates the time to install, the length installed over a set time and the weight of a specified length of Electrical Metallic Tubing (EMT Conduit).