How thick of wood can a laser cutter cut? Ultimate Guide

When you want to make intricate designs on wood, nothing does it better than a laser cutter. From everyday items like coasters and clocks to art pieces and decor items, cutting wood with a laser cutter will result in jaw-dropping designs.

But there’s a caveat – a laser cutter is limited to the depth it can cut in wood. So you have to choose the right wood thickness as well as the right laser cutter before you get started on your project.

How thick of wood can a laser cutter cut?

Laser cutters can cut wood with a thickness of up to 30 mm (1.18“). However, most laser cutters are more effective when the material thickness ranges from 0.5 mm to 12 mm (0.02″ to 0.47″).  

Additionally, the thickness of wood that can be cut with a laser cutter largely depends on the wattage of the laser machine. A higher-wattage machine can cut through thicker wood faster than a lower-wattage one.

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This guide covers everything you need to know to choose the right laser cutter for various wood thicknesses as well as the best wood for laser cutting:

What Determines How Thick Wood a Laser Cutter Can Cut?

1. Laser Power (Wattage)

The wattage of your laser cutter is the most important factor. More power equals deeper and faster cuts.

Note: Multiple passes may be required at lower wattages for thicker materials.

2. Wood Type

Softwoods (like basswood, balsa, birch) are easier to cut than hardwoods (like oak, maple, walnut). Hardwoods are denser and require more power to achieve the same cut depth.

3. Grain & Resin Content

Woods with high resin or inconsistent grain may burn unevenly. Plywood, for example, varies in quality and sometimes includes glue layers that resist cutting.

4. Air Assist & Focus

Using air assist improves cut quality by blowing away smoke and debris. Proper focus ensures the laser beam stays sharp for deeper penetration.

What are the common types of laser cutters for wood?

In addition to wood thickness, you must also select the right laser cutter for your project because laser cutting machines are not equal. Different laser machines are designed for different materials, and some are better suited for engraving as opposed to cutting.

The following are the two broad categories of laser machines that are best suited for wood cutting projects.

Semiconductor Diode Lasers

These machines are generally small and are therefore meant for smaller laser cutting projects. Semiconductor diode lasers pack a wattage ranging from 5 to 40W.

Semiconductor Diode Laser Wood Cutting Thickness Guide

Laser Power	Clean Cut Thickness	Max Thickness (Multi-Pass)	Best Use Case
5W	1/32-1/16″ 1–2 mm	1/16-3/32″ 2–3 mm	Engraving, paper, veneer
10W	1/16-3/32″ 2–3 mm	1/8-3/16″ 4–5 mm	Thin crafts, ornaments
20W	1/8-1/4″ 4–6 mm	1/4-5/16″ 6–8 mm	Signs, panels
40W	1/4-5/16″ 6–8 mm	5/16-3/8″ 8–10 mm	Thicker wood projects

What “Max Thickness” Really Means

There’s always a difference between possible and practical:

• Clean cut: smooth edges, minimal burn
• Max cut: slower, multiple passes, more charring

Important Notes:

• Values are approximate and depend on material type, air assist, focus, and number of passes.
• Always run test cuts to determine the best speed/power settings.
• Hardwoods and plywoods may require slower speeds or more passes, even at higher wattages.

CO₂ Laser Cutters

CO₂ laser cutters are ideal for wood cutting and engraving projects. If you are looking to set up a serious laser cutting/engraving business, then you want to go with a CO₂ laser cutter.

CO₂ laser cutters have a wattage of between 40 watts and 300 watts, which makes them perfect for most wood cutting projects.

CO₂ Laser Cutter Wood Cutting Thickness Guide

CO₂ Laser Power	Clean Cut Thickness	Max Thickness (Multi-Pass)	Recommended Passes	Best Wood Types
40W	3/32-1/8″ 3–4 mm	3/16-1/4″ 5–6 mm	1–2 passes	Plywood, MDF
60W	3/16-1/4″ 5–6 mm	5/16-3/8″ 8–10 mm	1–2 passes	Birch plywood, softwood
80W	1/4-5/16″ 6–8 mm	3/8-1/2″ 10–12 mm	1–3 passes	Birch plywood, pine
100W	5/16-3/8″ 8–10 mm	1/2-5/8″ 12–15 mm	1–3 passes	Hardwood, plywood
130W	3/8-1/2″ 10–12 mm	5/8-3/4″ 15–18 mm	1–4 passes	Hardwood, dense plywood
150W+	1/2-5/8″ 12–15 mm	3/4-13/16″ 18–20 mm	2–5 passes	Thick hardwood, MDF

Important Notes:

• Results vary depending on wood type, resin content, grain, and quality.
• Softwoods cut more easily than hardwoods due to lower density.
• Use air assist and proper focus for cleaner cuts and reduced charring.
• Multiple passes may be needed for hardwoods or precision edges.
• Always test settings before full production runs.

How thick of wood can a laser cutter cut? Practical Comparison

xTool S1 40W Diode Laser vs xTool P2S 55W CO₂ Laser For Thick Wood Cutting

If your main goal is cutting thick wood, the difference between the xTool S1 Diode Laser (40W) and the xTool P2S CO₂ Laser Cutter (55W CO₂) becomes very clear, very quickly.

Both are capable machines, but they operate on completely different levels when the thickness increases.

Quick Comparison (Focused on Thick Wood)

Feature	xTool S1 (40W Diode)	xTool P2S (55W CO₂)
Laser Type	Diode	CO₂
Clean Cut Thickness	1/4-5/16″ 6–8 mm	3/8-1/2″ 10–12 mm
Max Thickness	~ 3/8″, 10 mm (multi-pass)	~ 3/4-13/16″, 18–20 mm
Passes Needed (3/8″, 10 mm wood)	3–5 passes	1–2 passes
Cutting Speed	Slow	Fast
Edge Quality	More charring	Cleaner edges
Consistency on Thick Cuts	Moderate	High

Thick Wood Performance

xTool S1 Diode Laser (40W)

• Works best up to 6–8 mm (1/4-5/16″)
• Can reach 10 mm (3/8″), but:
  • Requires multiple passes
  • Slower speeds
  • More burn marks

You’re pushing the machine near its limit at that point.

xTool P2S CO2 Laser Cutter

• Handles 10–12 mm (3/8-1/2″) wood comfortably
• Can push to 18–20 mm (3/4-13/16″) with multiple passes
• Often cuts thick wood in 1–2 passes

This is where CO₂ lasers really separate themselves.

Speed Difference on Thick Cuts

This is one of the biggest real-world differences.

• S1 (40W diode):
  • Slows down significantly on thick wood
  • Multiple passes increase total job time
• P2S (CO₂):
  • Cuts faster even at higher thickness
  • Fewer passes = much higher efficiency

If you’re doing repeated cuts, this adds up quickly.

Edge Quality and Finish

Thicker wood amplifies edge quality differences.

• S1:
  • Darker edges
  • More charring
  • May need sanding or cleanup
• P2S:
  • Cleaner, smoother cuts
  • Less burn residue
  • More “finished” look straight off the machine

Reliability on Dense Materials

When wood gets thicker, density matters more.

• S1:
  • Can struggle with hardwood or glued plywood
  • Glue layers may block the cut
• P2S:
  • Handles hardwood and plywood much more consistently
  • Less affected by density variations

Workflow Differences

With the S1:

• More testing and tuning
• Multi-pass strategy required
• Slower overall workflow

With the P2S:

• Faster setup once dialed in
• Fewer passes
• More predictable results

Cost vs Capability

• S1 (40W):
  • Lower cost
  • Good for moderate thickness
• P2S (CO₂):
  • Higher investment
  • Built for thicker materials and production

If thick wood is a regular need, the extra cost often pays off in time saved.

Who Should Choose Which?

Choose the xTool S1 (40W) if:

• You mostly cut under 8 mm (5/16″) wood
• Thick cuts are occasional
• You want a simpler, lower-cost setup

Choose the xTool P2S (55W CO₂) if:

• You regularly cut 10 mm+ (3/8″) wood
• Speed and efficiency matter
• You want clean edges without extra work
• You’re producing items for sale

Final Verdict

For thick wood cutting, the winner is clear:

• The xTool P2S CO2 Laser Cutter is built for it
• The xTool S1 Diode Laser can do it, but with limits

If you’re pushing beyond 8–10 mm (5/16-3/8″) often, the CO₂ machine will save you time, improve quality, and reduce frustration.

Best Wood for Laser Cutting (Comparison Table)

Choosing the right wood makes a bigger difference than most people expect. The type of wood affects cut quality, speed, burn marks, and even whether the laser cuts through at all.

Here’s a clear, practical comparison:

Wood Types Comparison Table

Wood Type	Ease of Cutting	Edge Quality	Best Use Cases
Basswood	Very easy	Very clean	Crafts, models, engraving
Balsa	Extremely easy	Clean but soft edges	Prototypes, lightweight builds
Poplar Plywood	Easy	Clean	Signs, panels
Birch Plywood	Medium	Very clean (if high quality)	Furniture parts, premium projects
MDF	Easy	Smooth but darker edges	Signs, engraving boards
Pine	Medium	Slight burn marks	General woodworking
Oak	Hard	More charring	Decorative pieces
Maple	Hard	Dark edges	Fine engraving

Our Recommendations

Expert Tips for Laser Cutting Thick Wood

Cutting thicker wood with a laser is possible, but it’s where most machines start to struggle. Whether you’re using a diode machine like the xTool S1 Diode Laser or a CO₂ system, the difference comes down to technique.

Here’s how to get clean, reliable results without wasting material.

1. Don’t Force It in One Pass

Trying to cut thick wood in a single pass is the fastest way to get:

• Burned edges
• Incomplete cuts
• Excess smoke

Instead:

• Use multiple passes
• Keep power moderate
• Let the laser gradually work through the material

This gives you cleaner edges and more consistent cuts.

2. Use Strong Air Assist (Non-Negotiable)

Air assist makes a huge difference when cutting thicker wood.

It helps by:

• Blowing away debris and smoke
• Reducing charring
• Allowing deeper penetration

Without it, the laser beam gets blocked by smoke and residue.

Should you need to upgrade your air assist, we recommend the Ortur 0-50L/min Air Assist Pump, which is an excellent option.

3. Slow Down Your Speed

Thicker wood needs more exposure time.

• Reduce speed gradually
• Don’t immediately jump to 100% power
• Find a balance between speed and passes

A slower cut often works better than max power.

4. Choose the Right Wood

Material choice can make or break your cut.

Best options:

• Basswood
• Poplar plywood
• High-quality birch plywood

Avoid:

• Cheap plywood (glue layers block the laser)
• Dense hardwoods unless you have a powerful machine

Sometimes switching wood is more effective than changing settings.

5. Check and Adjust Focus

Focus becomes critical with thicker materials.

• Make sure the laser is focused at the surface for the first pass
• For deeper cuts, consider refocusing between passes

Even a small focus error reduces cutting power significantly.

6. Use Moderate Power, Not Always 100%

Running at full power all the time can:

• Burn edges
• Overheat the material
• Reduce cut quality

Try:

• 80–90% power
• Combine with slower speeds and multiple passes

This often produces better results.

7. Keep Your Optics Clean

A dirty lens or mirror reduces laser efficiency.

• Clean lenses regularly
• Check for smoke residue buildup

Even a slight loss of power matters when cutting thick wood.

8. Elevate Your Material

Don’t place wood flat on a solid surface.

Use a honeycomb bed or risers to:

• Improve airflow underneath
• Reduce back burn marks
• Help smoke escape

This small change improves cut quality a lot.

9. Expect Some Charring (and Plan for It)

Thicker cuts naturally produce more heat.

• Light sanding can clean edges
• Masking tape can reduce surface burn
• Air assist helps minimize damage

Perfect edges are harder to achieve at maximum thickness.

10. Know When to Switch Tools

If you’re consistently cutting:

• Wood thicker than 10–15 mm (3/8-5/8″)
• Dense hardwoods
• Large volumes

A CO₂ laser will save time and frustration.

Quick Summary

• Use multiple passes, not brute force
• Always enable air assist
• Slow down your cutting speed
• Choose better wood, not just stronger settings
• Keep everything clean and properly focused

Final Thoughts

It is a good idea to test out some waste wood and keep fine-tuning the settings on the laser cutter until you have the perfect setup. You can then move to the real material after you are sure of the results.

In addition to testing, get the right laser cutter and the appropriate wood, and your project will be a success.