Free Welding Calculators

Instant Welding Math.
No Signup Required.

Six calculators built on AWS A5.x, AWS D1.1, and ASME IX formulas. Use them in the field, in the shop, or at your desk. Completely free.

6 calculators  ·  100% client-side  ·  instant results

Welding Amperage Calculator

Get the right amperage range for any electrode, wire diameter, and welding process. Includes position adjustments.

📏

Travel Speed Calculator

Convert weld length and time into travel speed in IPM or mm/s. Checks your speed against typical process ranges.

🔥

Heat Input Calculator

Calculate heat input in kJ/in and kJ/mm using the AWS D1.1 / ASME IX formula. Critical for code-compliant WPS procedures.

⚖️

Weld Volume Calculator

Fillet weld area, volume, and filler metal weight for any process. Includes deposition efficiency factors for SMAW, GMAW, FCAW, SAW.

💨

Gas Flow Calculator

Recommended CFH for MIG and TIG based on cup/nozzle size and wind conditions. Avoid turbulent flow that causes porosity.

✂️

Kerf Width Calculator

Estimate kerf width and material loss for plasma, laser, waterjet, and oxy-fuel cutting. Includes CNC offset recommendation.

💰

Weld Cost Calculator AI

True cost per inch of weld — MIG, TIG, stick, flux-core. Wire, gas, labor, overhead breakdown. Industry benchmark comparison.

🔩

CNC Cut Time Calculator AI

Plasma, laser, waterjet, oxy-fuel cycle time and cost. Enter material, thickness, and shop rate. Get cost per inch, labor, and consumable breakdown.

📐

Bend Deduction Calculator AI

K-factor lookup (Machinery's Handbook), bend allowance (BA), bend deduction (BD), flat blank length, and springback estimate for any sheet metal part.

For bloggers & supply sites
Run a welding blog or supply site?
Embed these calculators on your pages — free, no API key, one iframe copy-paste.
Embed Calculator Widgets →

10 AI tools for welding and fabrication shops

The free calculators cover the math. IronKit's paid tools handle quotes, WPS documents, inspection reports, field reports, and more — all AI-generated in under 60 seconds.

Quote Writer WPS Generator Weld Cost Calculator Inspection Reports Field Reports

Start 14-Day Free Trial → $29/mo after trial. No credit card required.