Free tools

Free welding calculators for heat input, carbon equivalent and preheat.

Useful calculations, with the assumptions made visible. Use the free WeldTrace heat input, carbon equivalent and preheat calculators below.

Heat input calculator — metric

Calculate non-waveform-controlled heat input in metric units for ASME IX and ISO 1011-1 workflows.

Calculate non-waveform-controlled heat input using English or US customary units for AWS workflows.

Calculate carbon-equivalent values using EN 1011-2 methods A and B and the AWS D1.1 method.

Determine preheat using the hydrogen-control method described in AWS D1.1 Annex B.

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