Wood hardness is one of the most important factors when choosing lumber for furniture, flooring, or woodworking projects. The hardness of wood by species determines how resistant it is to scratches, dents, and wear. In woodworking, hardness is typically measured using the Janka Hardness Test, which gives a standardized way to compare different species.
In this guide, we’ll break down the hardness of common domestic and exotic woods, provide a chart of Janka ratings, and explain how to use hardness data when selecting lumber for your next project.
What Is the Janka Hardness Test?
The Janka Hardness Test measures the force needed to embed a 0.444-inch steel ball halfway into the surface of a piece of wood. The result is expressed in pounds-force (lbf).
- Lower Janka rating: Softer, easier to work (e.g., pine at ~380).
- Medium Janka rating: Balanced durability (e.g., walnut at ~1,010).
- Higher Janka rating: Extremely tough and wear-resistant (e.g., ipe at ~3,680).
This test helps woodworkers and builders understand how a species will perform in high-traffic flooring, heavy-use furniture, or delicate carving projects.
Domestic Wood Species and Their Hardness
Here are some of the most common North American woods ranked by hardness:
| Species | Janka Hardness (lbf) | Notes |
|---|---|---|
| Balsa | 100 | Very soft, hobby use only |
| Eastern White Pine | 380 | Lightweight, dents easily |
| Douglas Fir | 660 | Construction lumber |
| Black Cherry | 950 | Furniture, cabinets |
| Black Walnut | 1,010 | Premium furniture, cutting boards |
| Red Oak | 1,290 | Common in flooring, furniture |
| Hard Maple | 1,450 | Butcher blocks, cutting boards |
| Hickory | 1,820 | Strong, shock-resistant |
| Osage Orange | 2,620 | Extremely durable, tool handles |
Exotic Wood Species and Their Hardness
Many exotic hardwoods are significantly denser than domestic species:
| Species | Janka Hardness (lbf) | Notes |
|---|---|---|
| Teak | 1,070 | Outdoor furniture, resistant to rot |
| Mahogany (Genuine) | 800 | Classic furniture wood |
| Padauk | 1,970 | Bright orange-red tone |
| Purpleheart | 2,520 | Vibrant purple, very dense |
| Brazilian Walnut (Ipe) | 3,680 | Outdoor decking, nearly indestructible |
| Lignum Vitae | 4,500 | Industrial uses, self-lubricating |
| Australian Buloke | 5,060 | Hardest known wood |
Why Hardness Matters
The hardness of wood affects more than just durability. It influences:
- Furniture longevity – Harder woods resist scratches and dents.
- Flooring wear – High Janka rating species are better for high-traffic areas.
- Tool wear – Extremely hard woods dull blades faster.
- Workability – Softer woods are easier to carve and join.
A balance is often best: while extremely hard species are durable, they may be impractical for everyday woodworking.
Using Hardness Data in Projects
- Cutting boards and butcher blocks: Hard maple (~1,450) is ideal — hard but not knife-destroying.
- Flooring: Red oak (~1,290) and hickory (~1,820) balance wear resistance with workability.
- Outdoor projects: Ipe (~3,680) and teak (~1,070) excel in durability and weather resistance.
- Carving and turning: Softer woods like cherry (~950) are easier to shape.
Wood Hardness Chart (Quick Reference)
| Category | Wood Species | Hardness Range (lbf) |
|---|---|---|
| Softwoods | Balsa, Pine, Fir | 100–660 |
| Medium | Cherry, Walnut, Oak | 950–1,290 |
| Hard | Maple, Hickory, Beech | 1,300–1,820 |
| Very Hard | Osage Orange, Padauk, Purpleheart | 2,000–2,600 |
| Extreme | Ipe, Lignum Vitae, Australian Buloke | 3,600–5,000+ |
From Soft to Unstoppable: Picking the Right Wood
The hardness of wood by species gives you a powerful guide when selecting lumber. For most woodworkers, species like maple, oak, and walnut strike the best balance of strength and workability. For heavy-duty flooring or outdoor projects, exotics like ipe or lignum vitae shine.
At the far end of the spectrum, species like Australian Buloke showcase the sheer extremes of natural durability — a reminder that wood is as varied and versatile as any material on Earth.