FORMULA AND ASSUMPTIONS
Wire area = pi x diameter squared / 4. Gross mass rate equals wire area x wire-feed length x density, after converting mm, m, cm3 and kg. Deposited rate equals gross mass rate x deposition efficiency.
Density presets are nominal values. Flux-cored wire density varies with construction; use a documented product density when accuracy matters. Efficiency accounts for spatter, stub loss, fume and other metal not retained in the weld.