Calculate welding heat input quickly and accurately with our advanced online tool. As a vital part of welding engineering and metallurgy, understanding the relationship between arc voltage, welding current, and travel speed is essential for managing cooling rates and weld quality. This Welding Heat Input Calculator supports both Metric and Imperial units, making it the ideal resource for international fabrication standards.

Heat Input

Heat Input (KJ/mm or KJ/inch) =
Welding Process Thermal Efficiency
Tungsten inert gas (TIG) / gas tungsten arc welding (GTAW) 0.6
Plasma arc welding (PAW) 0.6
Metal inert/active gas (MIG/MAG) / gas metal arc welding (GMAW) 0.8
Flux cored arc welding (FCAW) / Metal cored (MCAW) 0.8
Manual metal arc welding(MMA)/shielded metal arc (SMAW) 0.8
Submerged arc welding (SAW) 1

Welding Heat Input Calculator

Use this handy and easy welding heat input calculator for online heat input calculation for all welding processes.