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Weld Cost Estimator

Calculate total fabrication welding costs combining labor time, filler wire deposition rates, shielding gas flow, and operating factor to find cost per foot of weld.

Weld Parameters

120

Total Estimated Cost

$96.82
Labor (1.1 hrs)$70.91
Consumables (Wire/Gas)$25.91
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The Apprentice Corner 📚

Cost Factors: A weld's cost isn't just the hourly rate of the welder.

It is a combination of Labor Time (determined by the deposition speed of the process) + Consumables (filler wire cost per lb) + Shielding Gas (cost per hour of trigger time). Stick welding has no gas cost, but its much slower deposition rate drives up the labor cost significantly.

The Journeyman's Note ⚡

"Operating Factor (Arc-On time) realistically limits production. In a standard 8-hour shift, an automated robot might hit 80% Operating Factor. Hand-held TIG welding might only hit a 15% Operating Factor due to fit-up, cleaning, and repositioning."
For estimation purposes only. Always consult a licensed professional before beginning work. Full Trade Safety Notice →

What is Welding Economics: Why Labor Dominates Every Cost Estimate?

Labor typically accounts for 80-85% of total welding cost. Companies obsess over saving pennies on wire or gas, but improving operating factor (arc-on time percentage) produces massive financial returns. A shift from 20% to 40% arc-on time cuts labor cost per pound of weld by half.

Mathematical Foundation

Cost Per Foot of Weld
Cfoot=Labor+OverheadDepRate×OF+ConsumablesYieldC_{foot} = \frac{\text{Labor} + \text{Overhead}}{\text{DepRate} \times OF} + \frac{\text{Consumables}}{\text{Yield}}
CfootC_{foot}= Total cost per linear foot of weld
DepRate\text{DepRate}= Deposition rate (lbs/hr the machine outputs)
OFOF= Operating factor — arc-on time as decimal (0.0-1.0)
Yield\text{Yield}= Filler metal efficiency: Solid wire = 95%, FCAW = 85%, Stick = 60%

Laws & Principles

  • Operating Factor (Arc-On Time): SMAW (Stick) = 15-20%. GMAW (MIG) = 40-50%. Robotic MIG/MAG = 80-90%. This single variable dominates the entire cost equation.
  • SMAW Has 60% Yield: A 50 lb box of stick electrodes produces only ~30 lbs of actual weld metal. The rest is flux coating, stub ends, and spatter waste.
  • MIG Has 95% Yield: Solid wire MIG has virtually zero waste — no slag, no stubs, minimal spatter. FCAW dual-shield is ~85% due to slag.
  • Deposition Rate Is Process-Dependent: Stick: 3-5 lbs/hr. MIG short-circuit: 5-8 lbs/hr. MIG spray: 10-15 lbs/hr. SAW: 20-40 lbs/hr.
  • Use Burdened Labor Rate: Include overhead (electricity, insurance, rent, benefits) — not just the welder's hourly wage. A $28/hr welder often has a $55-70/hr burdened rate.

Step-by-Step Example Walkthrough

" Comparing Stick vs MIG labor cost at a $55/hr burdened shop rate. "

  1. 1. Stick: 3 lbs/hr × 20% arc time = 0.6 lbs actual weld per hour.
  2. 2. Stick labor cost: $55 / 0.6 = $91.67 per lb deposited.
  3. 3. MIG: 8 lbs/hr × 45% arc time = 3.6 lbs actual weld per hour.
  4. 4. MIG labor cost: $55 / 3.6 = $15.28 per lb deposited.
Final Result: Switching from Stick to MIG drops labor cost from $91.67/lb to $15.28/lb — an 83% reduction. This dwarfs any difference in consumable cost.

Quick Answer: What Does Welding Actually Cost Per Foot?

Labor is 80-85% of total cost. A Stick welder at $55/hr burdened rate with 20% arc-on time produces 0.6 lbs/hr of actual weld — $91.67 per pound. A MIG welder at the same rate with 45% arc-on time produces 3.6 lbs/hr — $15.28 per pound. The wire and gas cost is almost irrelevant compared to the labor efficiency gap. This calculator breaks down every component so you can see exactly where your money goes.

Process Cost Comparison ($55/hr Burdened Rate)

Process Dep Rate Arc-On % Yield Labor $/lb
SMAW (Stick)3 lbs/hr20%60%$91.67
FCAW (Flux-Core)8 lbs/hr35%85%$19.64
GMAW (MIG Short)6 lbs/hr45%95%$20.37
GMAW (MIG Spray)12 lbs/hr45%95%$10.19
SAW (Submerged)25 lbs/hr50%99%$4.40

These are labor-only costs. Add $0.50-2.00/lb for consumables (wire + gas) and $0.10-0.30/lb for electricity. Even with consumables, SAW is 20× cheaper per pound than Stick.

Weld Cost Reality Checks

The Cheap Wire Fallacy

A shop owner switches from premium ER70S-6 wire ($1.10/lb) to generic import wire ($0.75/lb) to "save money" on a 10,000-lb structural steel project. The cheap wire produces 30% more spatter, requiring grinding between passes. Arc-on time drops from 45% to 32%. At $55/hr burdened rate: Premium wire + 45% arc time = $15.28/lb labor + $1.16/lb consumable = $16.44/lb total. Cheap wire + 32% arc time = $21.48/lb labor + $0.79/lb consumable = $22.27/lb total. The $0.35/lb wire "savings" cost $5.83/lb in lost productivity. Total project loss: $58,300.

The Process Change ROI

A structural steel fabricator uses FCAW dual-shield for heavy plate work at 8 lbs/hr, 35% arc time. Annual weld metal deposited: 120,000 lbs. The estimator calculates switching to MIG spray transfer for the flat/horizontal joints (60% of work) at 12 lbs/hr, 45% arc time. For 72,000 lbs of spray-able joints, labor drops from $19.64/lb to $10.19/lb — saving $680,400 annually. Equipment investment: two new power sources + wire feeders = $16,000. Payback period: 8.6 days.

Pro Tips for Weld Cost Control

Do This

  • ✓Focus on arc-on time first, consumable cost last. Improving operating factor from 30% to 45% reduces labor cost per pound by 33%. No consumable change can match that. Invest in fit-up fixtures, better joint access, and pre-set machines instead of hunting for cheaper wire.
  • ✓Use the burdened shop rate, not the welder's wage. A welder earns $28/hr but costs the shop $55-70/hr after benefits, insurance, equipment depreciation, rent, and utilities. Using the raw wage makes every process look 50% cheaper than reality.

Avoid This

  • ✗Don't ignore rework cost. A rejected weld costs 5-10× the original weld to repair (gouge out, re-prep, re-weld, re-inspect). A 2% rework rate can add 10-20% to total welding cost. Factor in your historical rejection rate when estimating.
  • ✗Don't compare consumable prices without yield. Stick rod at $2.00/lb with 60% yield = $3.33/lb of deposited metal. MIG wire at $1.10/lb with 95% yield = $1.16/lb of deposited metal. The cheaper-per-pound consumable can be the more expensive option when yield is accounted for.

Frequently Asked Questions

What is operating factor and why is it so important?

Operating factor (OF) is the percentage of paid time the welder's arc is actually burning and depositing metal. A Stick welder may have 20% OF — meaning in an 8-hour shift, the arc is on for only 96 minutes. The rest is electrode changes, slag chipping, repositioning, setup, and breaks. A MIG welder typically hits 40-50% because there's no electrode change and minimal cleanup. Every percentage point of OF improvement translates directly to reduced labor cost per unit of weld.

Why is Stick welding still used if it costs 6× more per pound?

Stick (SMAW) requires no shielding gas bottles, no wire feeder, and no external gas supply. It works in wind, rain, and remote locations where MIG is impossible. Pipeline welders use Stick because you can't run 50-pound wire spools up a mountain. Maintenance welders use it because one $200 machine handles everything from cast iron to stainless. The cost premium is accepted when portability, versatility, or field conditions make other processes impractical.

How much does shielding gas actually affect total weld cost?

Gas is typically 2-5% of total MIG welding cost. A 300 CF cylinder of 75/25 Ar/CO₂ costs $30-45 and lasts 15-20 hours at typical flow rates. At 3.6 lbs of weld metal per hour (MIG), one cylinder covers 54-72 lbs of deposited metal — adding $0.42-0.83 per pound. Compare this to labor at $15-22 per pound. Reducing gas flow from 40 CFH to 30 CFH saves pennies per hour while maintaining adequate coverage. The economic leverage is in labor efficiency, not gas conservation.

Should I include overhead in the labor rate?

Absolutely — using the raw hourly wage produces dangerously low estimates. The burdened rate includes: employer FICA/Medicare (7.65%), workers comp insurance (8-15% for welding trades), health insurance ($500-1500/month), equipment depreciation, facility rent/utilities, and supervision overhead. A welder earning $28/hr typically has a burdened rate of $55-70/hr. Using $28/hr instead of $60/hr makes you underbid by 53% — a catastrophic estimating error on large fabrication projects.

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