Welding Reference Card
One page. MIG, TIG, stick and flux core settings by thickness.
$3.99
Buy💨 Shielding Gas Flow Rate Calculator
Calculate optimal gas flow in CFH and L/min for your welding process
Welding
Complete Welding Settings Guide
19 pages. Four processes, stainless and aluminum, symbols and inspection.
$12.99
Buy
Welding Job Estimator
Price the job, then hand over a quote with no internal numbers.
Excel or Google Sheets. Best on a computer.
$29.00
BuyBEST VALUE
Welding Complete Bundle
Card, 19-page guide and the estimator workbook. All six files.
Excel or Google Sheets. Best on a computer.
$34.99
$45.98 if bought separately — save $10.99
BuyCheckout opens in a new tab.
Essential Shielding Gas Equipment
Regulators, cups, leak detection, and hoses that support consistent delivery—matching what this calculator assumes at the torch.
Best value
Victor Regulator for Argon/CO₂
- Dual gauges for cylinder pressure and delivery pressure
- CGA-580 fitting for argon, CO₂, and mixed cylinders
- Brass body for long service life
- Precise dial-in from roughly 5–60 CFH
- Works with inline flowmeters for verification
RXWeld TIG Gas Lens Cup Kit
- Gas lens flow for wider shielding coverage
- Multiple cups (#4–#7) for access and amperage
- Often lowers wasted CFH versus conventional collets
- Fits common WP-17 / 18 / 26 style torches
- Strong choice for stainless and aluminum
Solar Flux Type B
- Backside stainless protection when purge setup is impractical
- Quick brush-on vs long purge dam setup
- 304 / 316 sanitary and pipe applications
- Cost-effective for higher joint counts
- Water-soluble cleanup
PT199 Gas Leak Detector Pen
- Finds micro-leaks at fittings and torch connections
- Non-corrosive on brass and O-rings
- Brush reaches crowded regulator and swivel areas
- Instant bubbles on leaks
- Use on argon, CO₂, helium, oxygen, acetylene
RXWeld Oxy-Acetylene Twin Hose
- 25 ft mobility around benches and fixtures
- Twin-line layout reduces tangles
- Grade-T construction for cutting and heating
- Color-coded lines reduce hookup mistakes
- Standard B fittings on many shop setups
As an Amazon Associate, TestTalkHQ earns from qualifying purchases. Dialing in CFH is step one—stable delivery and leak-free fittings are what keep measured flow real at the arc.
How to Use the Shielding Gas Flow Rate Calculator
Select your welding process, gas type, wire/electrode size, stickout distance, material type, and position. The calculator recommends an optimal flow rate in both CFH (cubic feet per hour) and L/min (liters per minute), plus a suggested range for fine-tuning based on conditions.
Understanding Shielding Gas Flow
Flow rate is how much gas exits your torch per unit time. Too little risks porosity and oxidation; too much can cause turbulence and wasted gas.
Flow rate is measured in CFH (USA) or L/min (metric). Real-world factors—hose length, drafts, nozzle design, and humidity—affect actual coverage at the arc.
Process-Specific Flow Rates
MIG Welding (GMAW): Typically 15–25 CFH for solid wire. With 0.030" wire and 3/8" stickout on mild steel, 18–20 CFH is common. Flux-core often needs a few CFH more. Helium blends typically need higher flow than pure argon.
TIG Welding (GTAW): Often 12–18 CFH on mild steel, higher for stainless or aluminum depending on cup and travel. Argon is standard; helium blends need more flow.
Stick Welding (SMAW): Open-arc stick uses no shielding gas; gas-shielded processes depend on manufacturer specs.
Plasma Cutting: Often 35–60+ CFH depending on amperage and nozzle. Low flow hurts cut quality and consumable life.
Wire Diameter and Flow Rate
Smaller wire focuses the arc; larger wire may need slightly more shielding. Treat wire size as context alongside stickout and gas type.
Stickout Distance (Contact Tip to Nozzle)
Longer stickout spreads the gas path—in this calculator, stickout selections adjust the recommended CFH consistent with the live tool.
Shielding Gas Types
Argon: Common baseline for TIG and many MIG applications.
CO₂ and blends: Often slightly higher effective flow needs versus pure argon; blends like C25 are common on steel MIG.
Helium / Ar-He: Light gases may need higher flow than argon alone.
Common Problems
Porosity: Often insufficient flow or leaks; verify fittings and drafts.
Excessive spatter: Often process tuning first; if gas-related, slight flow reduction can reduce turbulence.
Weld Looks Oxidized/Discolored: Gas flow too low or contaminated. Increase flow slightly and verify hose integrity.
High cylinder usage: Check for leaks, excessive flow setting, or regulator issues.
Pro tip: Re-check flow when seasons or ventilation change. An inexpensive inline flowmeter is one of the best purchases for consistent CFH at the torch.
Measuring and Verifying Gas Flow
A regulator shows delivery pressure, not necessarily volumetric flow at the torch—inline flowmeters are ideal for verification.
Looking for torches and gear? See our reviews. For shop air (not shielding gas), see the CFM Calculator.
Related Tools & Resources
- Gas Cylinder Duration Calculator — how long your argon/CO2 tank lasts
- Welding Gas Cost Calculator — $/hr for shielding gas
- Common Weld Defects: Porosity, Undercut & Overlap
- How to Choose Shielding Gas for MIG and TIG
- All Free Calculators & Tools
- → Shielding Gas Flow Chart