welding calculator
Welding Amperage Guide
A starting-point amperage range for stick (SMAW) or MIG (GMAW) welding, based on material thickness. A setup guide — not a WPS.
How it works
midpoint = thickness_in x amps-per-inch (SMAW ~800, GMAW ~900). range = midpoint +/- 15%.
Worked example
1/4 in plate, SMAW: 0.25 x 800 = 200 A (range 170-230 A).
When to use it
- A starting point only — dial in from a scrap coupon and read your electrode/wire spec.
- Thin sheet, vertical/overhead position, and joint fit-up all lower the practical current.
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All results are an engineering estimate — not for custody transfer. Field measurement and certified tables govern.