Welding Cost Calculator: Estimating Electrode, Labour & Power Cost for Fabrication Contracts
Welding cost = electrode/filler cost + labour + power + shielding gas, marked up for overhead. This guide breaks down each component with a worked fabrication-job example and a free calculator for quoting and vendor-quote checks.
Welding cost formula:
Total Welding Cost = Electrode/Filler Cost + Labour Cost + Power Cost + Shielding Gas Cost, marked up by an overhead percentage for consumables and margin
Use the free Welding Cost Calculator at cisuitepro.com/calculators/welding-cost-calculator to compute the full breakup instantly — no signup required.
Most rough welding estimates go wrong in one of two places: treating "arc-on time" as if it were the whole job (it usually isn't), or ignoring duty cycle when estimating power cost. Both are covered below alongside the full worked example.
The Welding Cost Formula
Four cost components, summed and marked up for overhead:
- Electrode/filler cost = filler metal required (kg) × cost per kg
- Labour cost = arc-on time (hr) × fully-loaded labour rate (₹/hr)
- Power cost = machine power rating (kW) × duty cycle (%) × arc-on time (hr) × electricity rate (₹/kWh)
- Shielding gas cost = gas flow rate (L/min) × arc-on time (min) × gas cost (₹/L)
Electrode / Filler Metal Cost
Consumption depends heavily on process, joint type, and weld volume. As a rough planning figure, MIG/MAG welding typically deposits 1.5–3 kg of wire per hour of arc-on time at common industrial settings; stick (SMAW) electrode consumption is usually estimated per linear metre of weld and joint volume instead. For accurate quoting, pull the actual deposition rate from the job's WPS (Welding Procedure Specification) or a trial run rather than a generic assumption.
Labour Cost — Arc-On Time vs Total Job Time
Arc-on time is only the minutes the arc is actually struck and metal is being deposited. On complex fabrication work, arc-on time is often just 20–40% of a welder's total shift — the rest is fit-up, tack welding, repositioning, grinding, and inspection. A cost estimate built only on arc-on labour will significantly understate the true job cost unless fit-up and finishing labour is added as a separate line item.
Power Cost and Duty Cycle
Duty cycle is the percentage of a time period a welding machine can operate at rated output before needing to cool — a 60% duty cycle over 10 minutes means roughly 6 minutes of actual welding and 4 minutes of rest or repositioning within that window. For cost estimation, multiply the machine's kW rating by duty cycle rather than 100%, or power cost will be overstated. Example: a 6 kW machine at 60% duty cycle running for 6 hours draws roughly 6 × 0.6 × 6 = 21.6 kWh, not 36 kWh.
Shielding Gas Cost
Gas flow rate varies by process and joint accessibility — always confirm the process before estimating:
| Process | Typical Shielding Gas Flow |
|---|---|
| MIG/MAG (GMAW) | 10–20 L/min |
| TIG (GTAW) | 5–15 L/min |
| Flux-cored (self-shielded) | No external shielding gas |
Full Worked Example
A fabrication job uses 2.5 kg of filler wire at ₹450/kg, 6 hours of arc-on time at a fully-loaded welder rate of ₹200/hr, a 6 kW welding machine at 60% duty cycle on ₹9/kWh power, and 12 L/min of shielding gas at ₹0.9/L, with 10% overhead for consumables:
| Component | Calculation | Result |
|---|---|---|
| Electrode/filler cost | 2.5 × 450 | ₹1,125.00 |
| Labour cost | 6 × 200 | ₹1,200.00 |
| Power cost | 6 × 0.6 × 6 × 9 | ₹194.40 |
| Gas cost | 12 × (6 × 60) × 0.9 | ₹3,888.00 |
| Subtotal | sum of above | ₹6,407.40 |
| Total (with 10% overhead) | 6,407.40 × 1.10 | ₹7,048.14 |
MIG vs TIG vs Stick Welding — Cost Drivers Compared
The three common industrial processes have different cost profiles even for a similar joint:
| Process | Deposition Rate | Typical Cost Driver |
|---|---|---|
| MIG/MAG (GMAW) | Fast — highest deposition rate | Wire + gas cost; fastest labour hours for a given weld volume |
| TIG (GTAW) | Slow — precise, low spatter | Highest labour hours per metre of weld; used where finish/quality demands it |
| Stick (SMAW) | Moderate; no gas required | Lower equipment cost; more electrode change downtime; no shielding gas cost |
Estimating Cost for an AMC or Fabrication Contract
When quoting a full fabrication or repair-welding contract rather than a single weld, add fit-up and finishing labour as a separate line alongside arc-on labour, and build in a consumables allowance (grinding discs, wire brushes, PPE) as the overhead percentage on top of the electrode/labour/power/gas subtotal. For recurring AMC-style welding coverage, budget using a representative job mix rather than a single worst-case or best-case job.
Calculate Your Welding Cost
Enter filler consumption, labour rate, machine power rating, duty cycle, and gas flow into the free Welding Cost Calculator at cisuitepro.com/calculators/welding-cost-calculator — it returns the electrode, labour, power, gas, and total cost breakup instantly for quoting or checking a fabrication contractor's quote.
Frequently Asked Questions
How do you calculate welding cost?
Total Welding Cost = Electrode/Filler Cost + Labour Cost + Power Cost + Shielding Gas Cost, then add an overhead percentage for consumables and margin. Electrode cost = kg of filler used × cost per kg; labour cost = arc-on hours × fully-loaded hourly rate; power cost = machine kW × duty cycle × hours × electricity rate.
What is duty cycle and why does it matter for welding cost?
Duty cycle is the percentage of time a welding machine can operate at rated output before cooling. A 60% duty cycle means the machine draws its rated power for roughly 60% of the arc-on session. Using 100% duty cycle in a cost estimate overstates power cost — multiply machine kW by the actual duty cycle instead.
How much filler/electrode does a typical welding job use?
MIG/MAG welding typically deposits 1.5–3 kg of wire per hour of arc-on time at common industrial settings. Stick (SMAW) consumption is usually estimated per linear metre of weld instead. For accurate quoting, get the deposition rate from the job's WPS or a trial run.
Is arc-on time the same as total welding job time?
No. Arc-on time is only the minutes the arc is struck. Total job time also includes fit-up, tack welding, repositioning, grinding, and inspection — arc-on time is often just 20–40% of a welder's total shift on complex fabrication work. Add fit-up/finishing labour separately for an accurate full-job estimate.
Which welding process is cheapest — MIG, TIG, or stick?
It depends on the job. MIG/MAG has the fastest deposition rate and lowest labour hours per metre of weld but needs shielding gas. TIG is slower and has the highest labour cost but gives the best finish/precision. Stick needs no shielding gas and has lower equipment cost but more downtime for electrode changes. Compare using the actual labour and consumable rates for your job rather than a general rule of thumb.
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