Welding Duty Cycle Calculator

Inputs

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Current from the welder nameplate or manual duty-cycle rating point.
A
Duty cycle paired with the rated current, usually based on a 10-minute cycle.
%
Welding current you want to screen against the machine rating.
A
Duty cycle you want at the target current.
%
Duty-cycle time base. Many welder ratings use 10 minutes.
min
Arc-on time within the cycle or weld segment you are planning.
min
Use 2 for the common I^2 heating approximation unless manufacturer data says otherwise.

Results

Default result
Edit inputs
Current at target duty
261.9A
Pass

From I^2 x duty = constant at the entered rating point.

Also computed

Duty at target currentPass38.4%

Planned duty cycle30%

Current for planned cycle282.8A

Current allowed for the planned arc-on fraction of the cycle.

Estimated 100% current154.9A

Required total cycle time7.812min

Required idle / cooldownPass4.812min

Idle/cooldown time needed after the planned arc-on interval at the target current.

Method notes 3 notes
  • Duty-cycle interpolation uses I^n x D = constant; n = 2 is the common current-squared heating screen.
  • Clamp the result to machine ratings from the welder manual, ambient-temperature derates, process mode, input voltage and thermal-protection behavior.
  • This is not a WPS, weld-quality, duty-cycle certification or generator-sizing approval.

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