Laser Cutter Exhaust Calculator
Exhaust airflow for a CO2 or fiber laser cutter.
Enter your values
Enter the bed width in in.
Enter the bed depth in in.
Choose one of: Wood/paper (lower fume load), Acrylic/plastics (higher fume load).
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- 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)
At a glance
| What it does | Exhaust airflow for a CO2 or fiber laser cutter. |
|---|---|
| Category | HVAC & Airflow |
| Inputs needed | Bed width, Bed depth, Primary material |
| Main output | Recommended exhaust |
| Formula | CFM = bed area x rate (material-dependent) |
| Cost | Free — no sign-up, no download |
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.
Inputs explained
- Bed width(in)
- Enter the bed width in in.
- Bed depth(in)
- Enter the bed depth in in.
- Primary material
- Choose one of: Wood/paper (lower fume load), Acrylic/plastics (higher fume load).
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.
What do I need to enter into the Laser Cutter Exhaust Calculator?
Just 3 values: bed width, bed depth, primary material. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Laser Cutter Exhaust Calculator work out the answer?
Laser cutters commonly need 300-600 CFM of exhaust depending on bed size and whether plastics (needing more dilution) are being cut. It applies the formula CFM = bed area x rate (material-dependent) and shows the working so you can check each step by hand.
Is the Laser Cutter Exhaust Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.