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Welding Heat Input Calculator — result sheet
Estimate welding heat input per unit length from current, voltage, travel speed, and an entered efficiency factor.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Heat input = efficiency×60×voltage×current/(1000×travel speed), reported in kJ/in; equivalently efficiency×voltage×current×0.06/travel speed.
The result is a mathematical energy-per-length estimate and keeps process efficiency visible as an input. It does not qualify a welding procedure, choose a process factor, predict a weld profile, or replace the applicable code, WPS, inspection, or safety procedure.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Welding current — A; minimum 1.0E-6; maximum 1000000
- Arc voltage — V; minimum 1.0E-6; maximum 1000000
- Travel speed — in/min; minimum 1.0E-6; maximum 1000000
- Process efficiency — fraction; minimum 1.0E-6; maximum 10
Worked example
| Input | Value |
|---|---|
| Welding current | 180 |
| Arc voltage | 24 |
| Travel speed | 8 |
| Process efficiency | 1 |
Heat input = 32.4 kJ/in under the entered idealized efficiency factor.
Assumptions and limits
- Current is in amperes, voltage in volts, and travel speed in inches per minute, with a constant speed over the modeled length.
- Efficiency is a dimensionless fraction or multiplier entered by the user for the chosen process and setup.
- Preheat, interpass temperature, joint design, consumable, deposition rate, material thickness, cooling, procedure qualification, shielding, and operator safety are not modeled.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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