Welding Heat Input

Calculating weld heat input starts with the same math every time: voltage, current, travel speed, and efficiency. Welding Heat Input turns those numbers into an instant kJ/mm or kJ/in result — no more running the AWS D1.1 formula by hand between passes. HOW IT WORKS Pick your process — MIG, TIG, Stick, or FCAW — and the app fills in a reference efficiency value. Enter voltage, current, and travel speed, and heat input updates instantly as you adjust any input. WHAT YOU GET - Instant heat input: net heat input in kJ/mm and kJ/in, calculated using the AWS D1.1 Annex I formula - Process-based efficiency presets: reference values for MIG, TIG, Stick, and FCAW that you can override - Editable efficiency: reset to the process default anytime with one tap - Recent calculations: Save up to 10 calculations locally and reload them for a new pass - Works offline: the calculation needs no internet connection, no account, no sign-up Recommended For - Welders checking heat input between passes on site - Welding inspectors verifying settings against a WPS - Welding students learning how voltage, current, and travel speed affect heat input Efficiency values in this app are AWS D1.1 Annex I reference presets only — always confirm against your Welding Procedure Specification (WPS) and equipment manufacturer data before welding. This app does not replace a WPS, qualification testing, or a certified welding inspector.