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Arc Weld Heat Input per mm Calculator

HI = V × I × 60 / (1000 × travel_speed) — weld heat input.

Calculates weld heat input in kJ/mm from welding voltage, current, travel speed, and arc efficiency for standard arc welding processes.

Marcus Laurent By Marcus Laurent
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

HI (kJ/mm) = V × I × η / (1000 × travel_mm_per_s)

In depth

Calculates weld heat input in kJ/mm from welding voltage, current, travel speed, and arc efficiency for standard arc welding processes.