Welder Duty Cycle Checker
Can your machine hold this current? Duty-cycle math in both directions.
Duty cycle scales with current SQUARED — drop 20% in amps and a 60% machine becomes near-continuous. Ratings assume 40 °C ambient; a summer tin shed derates further.
Formula
Welder Duty Cycle Checker is a free duty cycle welding for welding engineers, fabricators and CWI inspectors — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Welder Duty Cycle Checker
Can your machine hold this current? Duty-cycle math in both directions. The calculation implements D₂ = D₁·(I₁/I₂)² (IEC 60974-1 duty cycle definition). Duty cycle scales with current SQUARED — drop 20% in amps and a 60% machine becomes near-continuous. Ratings assume 40 °C ambient; a summer tin shed derates further.
How to use Welder Duty Cycle Checker
- 1Enter Machine rated current in A.
- 2Enter Rated duty cycle in % (At 40 °C, per 10-min cycle).
- 3Enter Current you'll weld at in A.
- 4Read Available duty at your current, Arc minutes per 10-min cycle instantly — no submit button needed.
Why use Welder Duty Cycle Checker?
- ✓Implements the standard formula — D₂ = D₁·(I₁/I₂)²
- ✓Reference cited on-page: IEC 60974-1 duty cycle definition
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Welder Duty Cycle Checker use?+
It computes D₂ = D₁·(I₁/I₂)², per IEC 60974-1 duty cycle definition. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
Duty cycle scales with current SQUARED — drop 20% in amps and a 60% machine becomes near-continuous. Ratings assume 40 °C ambient; a summer tin shed derates further.
Does this follow AWS/IS welding codes?+
Each tool implements the formula from the cited code or handbook (AWS D1.1, IS 800, ISO/EN). Qualified WPS values always govern over any calculator for code work.
Is the Welder Duty Cycle Checker free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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