Plasma & Saw Cut Speed Calculator

Travel speed (IPM) and cut time for plasma, oxy-fuel, bandsaw, chop saw, and cold saw — not mill SFM/RPM

Set cutting method, material, thickness, and optional total cut length. For CNC mill/drill/tap RPM and feed, use the CNC Speed & Feed Calculator.

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Shop gear for metal cutting workflow

Practical accessories for setup, handling, and post-cut cleanup in fabrication and machine shops.

Measure
Starrett digital caliper

Starrett Digital Caliper

  • Verify stock and final dimensions fast
  • Useful for setup checks between cuts
  • Helps maintain repeatable tolerances
View on Amazon ->
Cut Prep
DEWALT angle grinder

DEWALT 4.5 in Angle Grinder

  • Quick edge cleanup after thermal cuts
  • Deburr and prep parts for fit-up
  • Solid utility tool for fab benches
View on Amazon ->
Safety
Leather work gloves

Leather Work Gloves

  • Handle hot cutoffs and rough edges
  • Improve grip during material setup
  • Useful across cutting and welding tasks
View on Amazon ->
Handling
DIYMAG lifting magnet

DIYMAG 350 lb Lifting Magnet

  • Move steel stock with safer control
  • Reduce awkward manual lifting strain
  • Good for staging plates near saws
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Storage
Heavy duty storage rack

Heavy Duty Shop Storage Rack

  • Organize stock, blades, and consumables
  • Supports high-weight fab inventory
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How to use this calculator

Select your cutting method, material, and thickness. For plasma, enter your machine amperage. Add cut length if you want a project-time estimate, then run the calculator for travel/feed speed guidance.

What results mean

  • Optimal Cutting Speed (IPM): recommended travel/feed rate baseline.
  • Expected Cut Quality: predicted quality band for the entered setup.
  • Total Cutting Time: estimated cutting-only duration using entered length.

Method guidance and FAQs

Why do plasma speeds change so much by thickness?

Plasma travel speed drops sharply as thickness rises because the arc must fully clear material through the kerf. Higher amperage can recover part of that speed loss.

Can oxy-fuel cut stainless or aluminum?

No. Oxy-fuel relies on the iron oxidation reaction and is intended for mild/carbon steel or cast iron, not stainless or aluminum.

What is the best first adjustment when cut quality is poor?

Adjust speed first. Thermal cuts often improve by moving closer to the proper travel speed before changing other settings.

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When Calculated SFM Still Fails — Diagnose or Pick Tooling

Tool burn-up, chatter, built-up edge, chip color vs calculator, or RPM beyond machine max: Cutting Speed Troubleshooting. Carbide vs HSS (speed capability & machine match): Carbide vs HSS Tooling.

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What this calculator does

Estimate cutting travel speed and time for plasma, oxy-fuel, bandsaw, chop saw, and cold saw workflows from material, thickness, and process. Plasma mode factors in machine amperage; optional total cut length turns IPM into minutes on the job. Quality guidance flags when you are likely outrunning the process for the thickness you entered.

What each input means

  • Cutting method: Plasma, oxy-fuel, bandsaw, abrasive chop saw, or carbide cold saw—each uses different speed logic.
  • Material type: Mild steel, stainless, aluminum, copper/brass, or tool steel—affects thermal and mechanical cutting rates.
  • Material thickness: Measured thickness in inches; primary input for speed tables.
  • Plasma cutter amperage: Shown for plasma only; higher amps allow faster travel on the same thickness.
  • Total cut length: Optional inches of cut path for project time estimates (layout perimeter or CNC length).

Using the results on the job

Schedule labor and machine time from the cutting-time output when you have a known cut length; add setup, pierce, and handling minutes separately. On plasma and oxy-fuel, adjust speed first when edge quality is poor—most dross and bevel issues trace to travel speed before amperage. Oxy-fuel is for carbon steel only; do not use those speeds on stainless or aluminum. For saws, treat IPM as feed guidance and listen for blade load—squeal usually means too fast or a dull blade.

When comparing plasma to bandsaw for the same part, run both methods if schedule is tight—thermal cuts need grind time that saws sometimes avoid on square tube. Document SFM or IPM on the router program or shop traveler so night shift matches day shift feeds. For quoting, multiply cutting time by your shop rate and add consumable wear (tips, blades, gas) as a separate line.

Re-run the calculator when you change plate thickness on the same nest—do not copy yesterday’s IPM without checking.