Materials
Walnut vs oak for a dining table: hardness, colour, movement and finish
Updated · 10 min read
Oak and walnut both make excellent dining tables. They differ in the ways that show after a few years of use: dents, colour, seasonal movement and finish.
Each name also covers more than one species. In Europe, oak usually means Quercus robur or Q. petraea, and walnut can be European (Juglans regia) or American black walnut (J. nigra). In North America, oak can be white or red. Ask your maker which one they are quoting for. Figures for the American species come from the USDA Wood Handbook; other sources are named where it has no data.
Key takeaways
- American white oak is about a third harder than American black walnut: 6,000 N (1,360 lbf) against 4,500 N (1,010 lbf) side hardness in the USDA Wood Handbook.
- European oak and European walnut are close in hardness on the Wood Database's figures, so the "oak is harder" rule applies mainly to the American species.
- Walnut tends to lighten in daylight, while white oak changes little and warms slightly. A finish slows the change but does not stop it.
- Across a flat-sawn top, black walnut moves about 27% less than white oak with the same change in humidity. Quartersawn boards of either species move about half as much as flat-sawn oak.
- Oak's large pores need grain filler for a glass-smooth film finish, and its tannins turn black on contact with wet iron. Walnut takes clear oils and natural finishes well.
- Walnut usually costs more than oak, mainly because of strong demand, narrower boards and waste from its pale sapwood.
Is walnut harder than oak?
For the American species, no. Hardness for timber is measured with the Janka test: the force needed to press a steel ball 11.28 mm (0.444 in) in diameter halfway into the wood. The Wood Handbook reports side hardness, which is measured on the face of the board, the surface a tabletop shows.
| Species | Side hardness at 12% moisture content | Specific gravity at 12% | Source |
|---|---|---|---|
| American white oak (Quercus alba) | 6,000 N (1,360 lbf) | 0.68 | USDA Wood Handbook, Table 5–3 |
| Northern red oak (Q. rubra) | 5,700 N (1,290 lbf) | 0.63 | USDA Wood Handbook, Table 5–3 |
| American black walnut (Juglans nigra) | 4,500 N (1,010 lbf) | 0.55 | USDA Wood Handbook, Table 5–3 |
| European walnut (J. regia) | 5,410 N (1,220 lbf) | not given | Wood Database |
| European oak (Q. robur) | 4,980 N (1,120 lbf) | not given | Wood Database |
The American Hardwood Export Council (AHEC) publishes almost the same figures: 6,049 N for white oak and 4,492 N for walnut.
The European figures come from a different source, and timber varies from tree to tree, so do not read much into a 10% gap between sources. The useful conclusion: American white oak is clearly harder than American black walnut, while between the two European species hardness should not decide it.
What hardness means for dents in daily use
A Janka figure describes resistance to a blunt, concentrated load: a dropped fork, the base of a heavy jug, a toy car, a ballpoint pressed through one sheet of paper. These will mark any solid wood table eventually, oak included. A harder timber marks less often.
- Busy family table, homework, crafts: white oak will show fewer dents than walnut.
- Mostly adult meals: walnut is perfectly practical, and its marks tend to read as wear rather than damage.
- Either species: write on a pad, put felt under ornaments and mats under hot dishes.
The finish matters as much as the timber. A dent in lacquer crushes or cracks the film and needs a specialist repair. An oiled or hardwax-oiled top dents into the wood, but you can usually sand the spot lightly and re-oil it. See our guide to oiled wood table care.
Colour and how it changes with light
Walnut. AHEC describes black walnut heartwood as light brown to dark chocolate brown, occasionally with purple streaks, and the sapwood as creamy white, a distinct contrast. American walnut is generally sold unsteamed and not selected for colour, though some specialist producers steam it to darken the sapwood. European walnut, AHEC says, tends to be lighter than American.
Oak. AHEC describes American white oak heartwood as light to mid or even dark brown, with less contrast between sapwood and heartwood than in red oak. The Wood Handbook describes red oak heartwood as brown with a tinge of red, which is the main visual difference between the two.
Change over time. Wood colour shifts with exposure to light. Grand Rapids Chair, a US furniture manufacturer, says walnut starts dark brown and gets lighter over time with honey undertones, while white oak shows minimal colour shift, its golden tones growing slightly richer. The German parquet maker JOKA describes the same pattern: oak takes on a warmer, amber tone, and walnut gradually becomes lighter. Grand Rapids Chair adds that a finish slows the change.
So a walnut table in a sunny room will lighten, and a bowl left in one place for months will leave a darker shadow. Move centrepieces around. If you are matching existing furniture, compare against an aged piece, not a fresh sample.
Grain and texture
Both timbers are ring-porous or close to it, but the pores differ in size. The Richter and Dallwitz Commercial timbers database gives average tangential vessel diameters of roughly 130–420 µm for white oaks and 75–210 µm for walnut. That is why oak has a more open, textured surface and walnut a finer one.
Oak also has large rays. The Wood Handbook notes that quartersawn oak shows broad, conspicuous rays (ray fleck), and AHEC says white oak's are longer than red oak's, giving a more pronounced figure. Walnut is normally straight-grained, though AHEC notes occasional wavy or curly figure.
Movement and stability
Solid wood shrinks and swells across its width as the humidity in the room changes. It moves very little along its length. The Wood Handbook describes black walnut as "stable in use". AHEC says white oak has "high differential radial and tangential shrinkage" and can be susceptible to movement in humid conditions.
The Handbook's dimensional change coefficients let you put numbers on it. At 21 °C (70 °F), wood in equilibrium with 30% relative humidity sits at about 6.2% moisture content, and at 60% relative humidity about 11.0% (Wood Handbook, Table 4–2). Here is how far a 1,000 mm (39.4 in) wide top of bare wood would move across that range at full equilibrium:
| Board cut | American white oak | American black walnut |
|---|---|---|
| Flat-sawn (tangential coefficient) | about 18 mm (0.71 in) | about 13 mm (0.52 in) |
| Quartersawn (radial coefficient) | about 9 mm (0.37 in) | about 9 mm (0.36 in) |
Calculated from Wood Handbook Table 13–5 (white oak 0.00376 tangential and 0.00194 radial; black walnut 0.00274 and 0.00190 per 1% change in moisture content).
These are full-equilibrium figures for bare wood. The Handbook notes that coatings such as varnish and lacquer slow moisture changes without preventing them, and that short-term swings mainly affect the surface, so a finished table responds more slowly. The comparison still holds: flat-sawn walnut moves noticeably less than flat-sawn oak, and quartersawn boards of either species move about half as much as flat-sawn oak.
Ask your maker how the top is fixed to let it move, and keep the table away from radiators and direct heat.
Finishes that suit each timber
Oak
- Grain filling. The Wood Handbook notes that large pores, especially in clusters as in oak, can leave low spots in a film finish and need filler for a smooth result. Under an oil finish the open grain stays visible, which many people prefer.
- Keeping it pale. A clear finish leaves a permanent "wet look" that makes pale oak look deeper in colour. Some products counter this with a little white pigment. Osmo UK, for example, says its Polyx-Oil Original Raw (3044) is meant for lighter woods such as oak and is not suitable for dark wood species.
- Iron stains. Oak is high in tannins. The Wood Handbook explains that iron reacts with tannins to leave a black stain, and names steel wool and wire brushes as sources. It notes the wood must be above about 16% moisture content for the stain to spread, so on a dining table the risk comes from a wet cast-iron pan or a damp tin left on bare wood.
Walnut
- Natural finishes. The Wood Handbook says black walnut is well suited to natural finishes, and AHEC says it can be stained and polished to an excellent finish.
- Colour. A clear oil gives walnut the same "wet look", which deepens its brown. Over time light pulls it towards a lighter brown with honey tones, whatever the finish.
- Hiding wear. Walnut is softer, so a finish you can repair locally, such as a hardwax oil, is worth considering on a table that will see heavy use.
Whatever the finish, ask your maker for the exact product name and care instructions in writing. Our guide to hardwax oil maintenance compares the main brands.
Availability and what drives the price
Prices change with exchange rates, grades and board sizes, so we do not quote them. These are the drivers your maker is pricing in.
- Demand. AHEC reports "huge global demand" for American walnut in recent years.
- Width and waste. The Wood Database notes walnut boards can be narrow and waste high if the pale sapwood is not planned for. AHEC says walnut grading admits sapwood without limit, so the maker may buy well over what the top needs.
- Thick stock. AHEC says not all suppliers carry thick white oak (10/4 and 12/4, about 64 and 76 mm or 2½ and 3 in) because it takes long to dry.
- Quartersawn boards. The Wood Database notes these cost more than flat-sawn white oak.
- Where you are. The Wood Database calls European oak moderately inexpensive where it grows locally, and European walnut likely to be rather expensive and sometimes available only as veneer. If a walnut quote looks low, ask whether any of it is veneered; see solid wood vs veneer furniture.
Sourcing and sustainability: questions to ask
Sustainability claims are easy to make and hard to check, so ask specific questions.
- Which species, grown where, and supplied by whom? Oak from the eastern United States and oak from France or Poland are different species. A maker should be able to name the merchant or sawmill.
- Is it certified? Ask whether the timber is FSC- or PEFC-certified, and whether the maker holds a chain-of-custody certificate. FSC explains that its label signals that materials met chain-of-custody requirements at every step of the supply chain. A maker who buys certified boards but is not certified themselves can tell you the source, but cannot label the finished table as FSC. You can look up certificate holders in FSC's public certificate search.
- What does the trade body data say? AHEC, citing US Forest Inventory and Analysis (FIA) data, reports American white oak growing at 40.1 million m³ a year against a harvest of 20.1 million m³, and black walnut growing at 4.8 million m³ against a harvest of 1.9 million m³. It says growth exceeds harvest in all major supplying states for white oak, and in all except Michigan for walnut. AHEC is an industry body and its pages do not state the data year, so treat this as context rather than proof for a particular board.
- What paperwork will I get? Ask for the species, origin and finish to be written on the invoice or care card.
How to decide
- Choose oak if the table will take hard daily use, if you want a lighter room, or if you like the open grain and ray figure of quartersawn boards.
- Choose walnut if you want a darker, finer-textured surface, accept that it will collect marks and lighten over time, and are happy to pay more for it.
- Either way, ask about board cut, the finish and its repair, and how the top is fixed to allow for movement. These decide how the table ages more than the species does. Our guide on how to commission custom furniture covers the rest.
Sources
- Wood handbook: wood as an engineering material, FPL-GTR-282 (2021), USDA Forest Products Laboratory: Table 5–3 side hardness and specific gravity, Janka test definition, Table 4–2 equilibrium moisture content, Table 13–5 dimensional change coefficients, species descriptions (Chapter 2), coatings slowing moisture change (Chapter 4), large pores and filler, iron stain (Chapter 16); accessed 31 October 2026
- American walnut, American Hardwood Export Council: colour, sapwood, steaming, demand, grading, hardness, FIA growth and harvest figures; accessed 31 October 2026
- American white oak, American Hardwood Export Council: colour, rays, thick stock availability, movement, hardness, FIA growth and harvest figures; accessed 31 October 2026
- English walnut, The Wood Database: Janka hardness of European walnut, price and availability; accessed 31 October 2026
- English oak, The Wood Database: Janka hardness of European oak, availability; accessed 31 October 2026
- Black walnut, The Wood Database: board widths, sapwood waste, relative price; accessed 31 October 2026
- White oak, The Wood Database: price of quartersawn and thick boards; accessed 31 October 2026
- Quercus (white oak) and Juglans, Commercial timbers, H.G. Richter and M.J. Dallwitz: vessel diameters of white oaks and walnut (walnut entry); accessed 31 October 2026
- Did you know: the color of wood changes naturally over time, Grand Rapids Chair: walnut lightening, white oak minimal shift, finishes slowing change; accessed 31 October 2026
- Colour changes, JOKA: oak warming to amber, walnut becoming lighter; accessed 31 October 2026
- Polyx-Oil Original Raw Matt, Osmo UK: white pigment to counter the wet look, suitable for oak, not for dark woods; accessed 31 October 2026
- Chain of custody certification, FSC: what the FSC label signals, public certificate search; accessed 31 October 2026
Questions this guide gets asked
Is walnut harder than oak?
Not if you compare the American species. The USDA Wood Handbook gives black walnut a side hardness of 4,500 N (1,010 lbf) at 12% moisture content, against 6,000 N (1,360 lbf) for white oak and 5,700 N (1,290 lbf) for northern red oak. Walnut is still a hard wood. It is simply softer than oak.
What about European walnut and European oak?
The Wood Handbook does not test the European species. The Wood Database lists European walnut at 5,410 N (1,220 lbf) and European oak at 4,980 N (1,120 lbf), so on those figures the two are close. Hardness varies from tree to tree, so treat small differences between sources as noise.
Will a walnut table fade?
Walnut tends to get lighter with exposure to light, with more honey tones. White oak changes less, its golden tones growing slightly richer. A finish slows the change but does not stop it, so expect a lighter patch where a runner or fruit bowl has not been.
Which moves less with the seasons?
Across a flat-sawn top, walnut does. The Wood Handbook's dimensional change coefficient for black walnut is about 27% lower than for white oak in the tangential direction. In quartersawn boards the two are almost identical, so the way the boards are cut matters as much as the species.
Is red oak a good choice for a dining table?
It is slightly softer than white oak but still harder than walnut. Its pores are open because they generally lack tyloses, unlike white oak's, and its heartwood has a reddish tinge. Ask your maker which oak they are quoting for, especially in North America, where both are common.
Can a dented table be repaired?
Usually, but how depends on the finish. An oiled or hardwax-oiled top can be sanded locally and re-oiled, while a lacquered top needs a film repair or full refinish. Ask your maker how they would repair the finish they propose before you choose.