How to Identify White Oak Wood (Quercus alba)

White Oak, Quercus alba: color, grain, end grain, Janka hardness (1,360 lbf) and weight, and how to tell it from Red Oak, quoted from the USDA Wood Handbook and The Wood Database.

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At a glance

Scientific name: Quercus alba
Type: Hardwood
Origin: Eastern North America
Color: Heartwood is a light to medium brown, commonly with an olive cast; paler sapwood is not always sharply demarcated from the heartwood.
Grain and texture: Grain is straight, with a coarse, uneven texture.
End grain: Ring porous; solitary earlywood pores in two to four rows, latewood pores in radial/dendritic arrangement; vessels very large in earlywood, small in latewood; tyloses abundant; parenchyma diffuse-in-aggregates; rays of two distinct sizes, wider rays conspicuous even without magnification.
Janka hardness: 1,360 lbf
Specific gravity (12% MC): 0.68
Other clue: Distinct smell while being worked, common to most oaks; heartwood contains abundant tyloses that make it liquid-tight, unlike red oak.

What White Oak looks like

Heartwood is a light to medium brown, commonly with an olive cast; paler sapwood is not always sharply demarcated from the heartwood. Grain is straight, with a coarse, uneven texture. End grain: Ring porous; solitary earlywood pores in two to four rows, latewood pores in radial/dendritic arrangement; vessels very large in earlywood, small in latewood; tyloses abundant; parenchyma diffuse-in-aggregates; rays of two distinct sizes, wider rays conspicuous even without magnification.

Hardness and weight

Janka hardness 1,360 lbf (side hardness: the force needed to embed a 0.444-inch steel ball to half its diameter). Specific gravity 0.68 at 12% moisture content, so a cubic foot weighs roughly 42 lb. Weight in the hand is one of the quickest checks: compare a piece of known size against a board you already know.

White Oak vs Red Oak

White oak's heartwood contains tyloses that red oak lacks (a classic field test: red oak lets air/water pass through an end-grain straw; white oak does not); ray height on face grain often exceeds 1 in. in white oak versus rarely over 1 in. in red oak; white oak also tends toward an olive cast versus red oak's reddish cast. The Red Oak page has its own details.

Smell, weight and other clues

Distinct smell while being worked, common to most oaks; heartwood contains abundant tyloses that make it liquid-tight, unlike red oak.

Where you will meet it

Cabinetry, furniture, interior trim, flooring, boatbuilding, barrels, and veneer.

Working it

Produces good results with hand and machine tools though fairly high shrinkage gives mediocre dimensional stability (especially flat-sawn); reacts with iron when wet, causing staining; responds well to steam-bending; oak reported as a sensitizer (eye/skin irritation, asthma-like symptoms).

How to photograph it for identification

Photograph a freshly cut or sanded face in daylight, not a finished or stained surface, since stain hides color and finish flattens grain. Add a close-up of the end grain: cut a clean end, wet it or sand it to 220, and shoot from straight on; pore pattern and rays are the most reliable marks. Put a ruler in frame. The app suggests the likely species; confirm with the end grain and weight.

FAQ

How hard is White Oak?

Janka hardness 1,360 lbf. For comparison, Red Oak is about 1,290 lbf and Eastern White Pine about 380 lbf.

How do I tell White Oak from Red Oak?

Is White Oak a hardwood or a softwood?

White Oak is a hardwood: it comes from a broadleaf tree. Hardwood and softwood describe the kind of tree, not how hard the wood is; some hardwoods are softer than some softwoods.

What color is White Oak?

Heartwood is a light to medium brown, commonly with an olive cast; paler sapwood is not always sharply demarcated from the heartwood.

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