Welding Amperage Calculator
Estimate welding current from material thickness and process using common rules of thumb.
Compare Your Options And Get Clear Answers
Estimate welding current from material thickness and process using common rules of thumb.
Welding Amperage Estimator
Enter your numbers below for an instant estimate.
How It Works
Key concepts behind this calculator
Enter Values
Fill in each field with your own numbers.
Calculate
Results update as you change the inputs.
Review
Read the breakdown and the explanation.
Adjust
Change values to compare scenarios.
Welding Quick Guide
Typical values for reference.
| Thickness mm | Process | Wire mm | Amps |
|---|---|---|---|
| 2 | 2 | 1.2 | 100 A |
| 6 | 2 | 1.2 | 240 A |
| 3 | 3 | 1.2 | 120 A |
| 5 | 1 | 3.2 | 128 A |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Welding Amperage Calculator FAQ
Answers to common questions about this calculator.
Around 240 A for MIG, but follow your data sheet.
Yes, check the consumable for correct polarity.
Stick: 40 A per mm of rod; TIG: 40 A per mm of metal; MIG: 35 A per mm + 30 A.
It is an estimate based on the inputs you enter. Check real quotes, labels or official guidance for important decisions.