Laser Cutter Exhaust Calculator
Exhaust airflow for a CO2 or fiber laser cutter.
Enter your values
ⓘ Live results
Results
- Recommended exhaust
- 640 CFM
- Duct at 2000 FPM
- 7.7 in dia
- Filtration
- Carbon + particulate filtration acceptable for occasional use
Quick answer
Laser cutters commonly need 300-600 CFM of exhaust depending on bed size and whether plastics (needing more dilution) are being cut.
CFM = bed area x rate (material-dependent)
How to use the Laser Cutter Exhaust Calculator
- 1Enter the laser bed dimensions.
- 2Choose the dominant material being cut — plastics need more dilution air.
- 3Vent to the outside where possible, especially for acrylic and other plastics.
Worked example
Using the values the calculator loads with:
Inputs
- Bed width24 in
- Bed depth16 in
- Primary materialWood/paper (lower fume load)
Results
- Recommended exhaust640 CFM
- Duct at 2000 FPM7.7 in dia
- FiltrationCarbon + particulate filtration acceptable for occasional use
Frequently asked questions
Can I filter and recirculate instead of venting out?
For wood/paper light use, carbon filtration can work, but acrylic fumes are best vented outdoors.
Why does duct size matter?
Smoke and soot residue build up faster in undersized, low-velocity ducts, creating fire risk and clogging.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.