Mig Welding Calculator - Migwelding.net
Welding Calculator
migwelding.net · 5-in-1 tool
Heat Input Calculator
V
A
mm/min
▾
▾
NET HEAT INPUT—kJ/mm
My Experience: On structural steel my foreman always kept heat input between 0.5–2.5 kJ/mm. Too high causes HAZ softening; too low risks incomplete fusion.
MIG Settings Estimator
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▾
mm
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VOLTAGE
—V
AMPERAGE
—A
WFS
—m/min
Pro Tip: These are starting-point estimates. Always run a test bead on scrap before welding your workpiece. Fine-tune voltage ±2V and WFS ±10% to dial in the arc — a steady frying bacon hiss means perfect short-circuit transfer.
Wire Deposition Rate
▾
m/min
▾
hr
RATE
—kg/hr
PER SHIFT
—kg
WIRE / SHIFT
—m
WPS Note: Deposition rate directly affects your Procedure Qualification Record (PQR). My supervisor always cross-checks these figures before approving a WPS for production runs.
Preheat Temperature — Carbon Equivalent
mm
CARBON EQUIVALENT (IIW)
—
MIN. PREHEAT TEMP
—°C
IIW Formula: CE = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15
My foreman's rule — if CE > 0.45, always preheat. No exceptions on structural jobs.
My foreman's rule — if CE > 0.45, always preheat. No exceptions on structural jobs.
Shielding Gas Consumption
L/min
hr
▾
▾
USED / SHIFT
—m³
CYLINDERS
—
% REMAINING
—%
Flow Rate Guide: MIG steel → 12–18 L/min · Aluminium → 18–24 L/min · Stainless → 10–16 L/min. Outdoor or drafty shop? Add 20–30% extra to compensate for crosswind.
