Home / Wood Compare / Cumaru vs Ebony
Professional Comparison · Verified Engineering Data · Updated 19 July 2026
Cumaru VS Ebony
Which wood is better for your project? Scores are computed from the verified figures on each species page — how we score.
🥇
Cumaru
98/100 Library Score
🪵Hardwood🌧Outdoor🔥Low Flame Spread💧Moisture Stable
- Harder wear surface (Janka 3330 vs 2430 lbf)
- Stronger in bending (MOR 175.1 vs 136.0 MPa)
🥈
Ebony
91/100 Library Score
🪵Hardwood🌧Outdoor🔥Low Flame Spread💧Moisture Stable
- Close second across most categories
- Solid choice where its profile fits the project
Visual comparison
CumaruEbony
Winner by category
There isn't one universally best wood — there's a best wood for each purpose.
| Category | Winner |
|---|---|
| Durability | Tie |
| Stability | Tie |
| Hardness | Cumaru |
| Strength (MOR) | Cumaru |
| Stiffness (MOE) | Cumaru |
| Flame spread | Tie |
| Machining ease | Ebony |
| Lightness | Tie |
Engineering data
| Property | Cumaru | Ebony |
|---|---|---|
| Janka Hardness | 3330WD lbf | 2430 lbf |
| Density | 0.87WD g/cm³ | 0.9 g/cm³ |
| MOE | 22.33WD GPa | 16.0 GPa |
| MOR | 175.1WD MPa | 136.0 MPa |
| Durability | Class 1 Very Durable | Class 1 Very Durable |
| Stability | Excellent | Excellent |
| Fire (E84) | Class A indicative | Class A indicative |
| Radial Shrink | 5.3WD % | 5.5 % |
| Tangential Shrink | 7.7WD % | 6.5 % |
| T/R Ratio | 1.45 | 1.18 |
Figures carry the same source status as the species pages they come from — verified where cited, indicative where marked.
Best for
| Application | Recommended | Suitability |
|---|---|---|
| Outdoor decking / pergola | 🥇 Cumaru | ★★★★★ |
| Exterior cladding | 🥇 Cumaru | ★★★★☆ |
| Flooring / wear surfaces | 🥇 Cumaru | ★★★★★ |
| Furniture / interior joinery | 🥇 Ebony | ★★☆☆☆ |
| Structural / load-bearing | 🥇 Cumaru | ★★★★★ |
Advantages & limitations
Cumaru
Advantages
- Rated for exterior exposure (EN 350 Class 1)
- Very low movement in service
- Hard wear surface, dent-resistant
- Best flame-spread class (E84 Class A, indicative)
Limitations
- Hard on tooling; pre-drilling recommended
- Heavy — consider structure and handling
Ebony
Advantages
- Rated for exterior exposure (EN 350 Class 1)
- Very low movement in service
- Hard wear surface, dent-resistant
- Best flame-spread class (E84 Class A, indicative)
Limitations
- Hard on tooling; pre-drilling recommended
- Heavy — consider structure and handling
Recommendation
Choose Cumaru if…
- The surface takes traffic or impact
Choose Ebony if…
- Its profile matches the application better than a single overall score
Frequently asked questions
Which is more durable, Cumaru or Ebony?
Neither — both carry the same EN 350 rating (Class 1, Very Durable). For outdoor decisions between them, weigh dimensional stability and hardness instead.
Which wood is better for outdoor use?
They are closely matched outdoors — durability and stability come out almost level. Let the application decide: harder surface for decking traffic, lighter weight for cladding.
Is Cumaru harder than Ebony?
Yes — Janka 3330 lbf vs 2430 lbf.
How we score. Each wood gets a weighted composite of the verified figures shown above: durability 22%, stability 18%, hardness 12%, bending strength 12%, machining ease 12%, stiffness 8%, flame spread 8%, lightness 8%. The Library Score is that composite's percentile rank within our 60-species library — 50 means the library median, 90 means it outperforms nine of every ten species we cover. No price data is scored — cost guidance is qualitative. The score summarises the data; it does not replace judgement about your specific application.