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Calculate arc heat input from voltage, current, travel speed, and process efficiency.
Calculate welding heat input from voltage, current, travel speed, and process efficiency for preliminary weld procedure review.
Configure the form first. Results, visuals, downloads, and copy-result actions remain hidden until Calculate Heat Input succeeds.
Your manufacturing inputs, dimensions, feed values, speed values, and material assumptions are processed locally in your browser. ScholarTool does not upload CAD files, drawings, CNC code, or manufacturing data to a third-party API.
This calculator does not upload drawings, parse CAD files, execute CNC code, generate G-code, call AI APIs, store manufacturing data, add analytics, or create user accounts.
Welding heat input estimates process energy delivered per unit weld length from voltage, current, travel speed, and an efficiency factor. It helps compare procedure conditions, but actual thermal cycles, penetration, microstructure, distortion, and code compliance depend on process and material details.
Welding Heat Input Calculator applies this concept to its defined inputs and workflow. It is designed to calculate preliminary welding heat input.
The calculator evaluates welding values and unit selection and returns heat input, arc power, and warnings using the stated method. The selected units and sign or reference conventions must describe one consistent physical case. Users should interpret the output within the assumptions shown on the page and repeat the check with trusted reference values when the result affects engineering or research decisions. No preheat, interpass temperature, joint geometry, metallurgy, code, or inspection model is included.
Calculates arc energy per unit length in kJ/mm or kJ/in.
Applies process efficiency to voltage-current power.
Shows warnings for welding procedure qualification context.
Heat input is electrical power multiplied by time per unit length, adjusted by process efficiency, and converted to kJ per unit length.
HI = eta x V x I x 60 / (travelSpeed x 1000)Returns kJ/mm for metric travel speed or kJ/in for inch travel speed.
| Symbol | Meaning | Unit |
|---|---|---|
| HI | Heat input | kJ/mm or kJ/in |
| eta | Process efficiency | dimensionless |
| V, I | Voltage and current | V and A |
ScholarTool manufacturing calculators provide general engineering calculation and planning support. They do not replace supplier requirements, tooling recommendations, machine-tool documentation, process qualification, inspection standards, or professional manufacturing review.
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