MIG Welding Calculator — Settings by Material & Thickness | Welders Supply — Welding Guides, Reviews & Technical Reference

Q: "How accurate is this MIG welding calculator?"

"These are proven starting parameters for common materials and thicknesses. They work as-is for most machines and conditions. Fine-tune voltage and wire speed based on bead appearance and sound — a steady sizzle means the arc is balanced."

Q: "Do MIG welding settings change for vertical or overhead positions?"

"Yes. Reduce voltage by 1-2V and wire speed by 10-15% for vertical-up welding. For overhead, reduce similarly and use a slightly shorter stickout. The calculator shows flat-position settings — adjust down for out-of-position work."

Q: "What if my material thickness is between two values on the chart?"

"Start with the settings for the thinner value and increase wire speed in small increments until you get full penetration. It is better to start low and build up than to burn through."

Select your material, thickness, and joint type. The calculator returns voltage, wire feed speed, wire diameter, shielding gas, gas flow rate, and amperage range as starting parameters.

All settings assume DCEP polarity (standard for MIG), clean material, and flat position. Adjust down for vertical and overhead positions.

Select your parameters above and click Calculate.

How to Use These Settings

Set your welder to the voltage shown. On machines with a voltage dial (not a numbered setting), set to the middle of the range and adjust.
Set wire feed speed to the middle of the range. Listen to the arc — it should sound like steady frying bacon. If it crackles and pops, increase wire speed. If it hums and pushes the gun back, decrease wire speed.
Set gas flow on your regulator to the recommended CFH. More gas is not better — excessive flow creates turbulence and pulls air into the weld zone.
Maintain 3/8" to 1/2" stickout (contact tip to work distance) for short-circuit transfer on mild steel.

For the complete MIG welding settings reference table, see the printable MIG settings chart. For process technique guides, see the MIG welding section.

Frequently Asked Questions

How accurate is this MIG welding calculator?

These are proven starting parameters for common materials and thicknesses. They work as-is for most machines and conditions. Fine-tune voltage and wire speed based on bead appearance and sound — a steady sizzle means the arc is balanced.

Do MIG welding settings change for vertical or overhead positions?

Yes. Reduce voltage by 1-2V and wire speed by 10-15% for vertical-up welding. For overhead, reduce similarly and use a slightly shorter stickout. The calculator shows flat-position settings — adjust down for out-of-position work.

What if my material thickness is between two values on the chart?

Start with the settings for the thinner value and increase wire speed in small increments until you get full penetration. It is better to start low and build up than to burn through.