Data accuracy & sources

Wood data is only useful if you can trust it. Here's an honest look at what we've verified, what's still provisional, and how to flag anything that looks wrong. We'd rather show our work than ask you to take our word for it.

Species reviewed

100 / 100

100% verified against sources

With citations

100 / 100

100% have linked sources

Finishing notes

54 / 100

54% documented

Glue-up notes

4 / 100

4% documented

With photos

10 / 100

10% have a reference photo

How we review

A species marked reviewed has had its Janka hardness and botanical name verified against a primary reference source (The Wood Database), with the citation recorded. Other fields — cost, workability, movement, and use guidance — are well-researched but not yet part of this formal verification pass. Janka numbers in particular vary by source and sample, so we treat them as representative, not absolute, and show a range where sources differ.

Spot something wrong?

Corrections are welcome and genuinely appreciated. Woodworkers know their woods. If a figure or note looks off, open an issue on GitHub with the species and what you'd change. Sourced corrections get applied fastest.

Per-species status

Species	Status	Sources
African Mahogany	Reviewed	1
African Padauk	Reviewed	1
Afzelia (Doussie)	Reviewed	1
American Beech	Reviewed	1
American Chestnut	Reviewed	1
American Elm	Reviewed	1
American Holly	Reviewed	1
American Sycamore	Reviewed	1
Apple	Reviewed	1
Bald Cypress	Reviewed	1
Balsa	Reviewed	1
Basswood	Reviewed	1
Bigleaf Maple	Reviewed	1
Black Ash	Reviewed	1
Black Cherry	Reviewed	1
Black Locust	Reviewed	1
Black Walnut	Reviewed	1
Black Willow	Reviewed	1
Bloodwood	Reviewed	1
Boxelder	Reviewed	1
Bubinga	Reviewed	1
Bur Oak	Reviewed	1
Butternut (White Walnut)	Reviewed	1
Canarywood	Reviewed	1
Catalpa	Reviewed	1
Claro Walnut	Reviewed	1
Cocobolo	Reviewed	1
Douglas Fir	Reviewed	1
East Indian Rosewood	Reviewed	1
Eastern Cottonwood	Reviewed	1
Eastern Hemlock	Reviewed	1
Eastern Red Cedar	Reviewed	1
Eastern White Pine	Reviewed	1
Engelmann Spruce	Reviewed	1
European Beech	Reviewed	1
European Walnut	Reviewed	1
European Yew	Reviewed	1
Flowering Dogwood	Reviewed	1
Gaboon Ebony	Reviewed	1
Hackberry	Reviewed	1
Hard Maple (Sugar Maple)	Reviewed	1
Hickory	Reviewed	1
Honey Locust	Reviewed	1
Hophornbeam (Ironwood)	Reviewed	1
Ipe	Reviewed	1
Iroko	Reviewed	1
Jarrah	Reviewed	1
Jatoba (Brazilian Cherry)	Reviewed	1
Koa	Reviewed	1
Lacewood	Reviewed	1
Lignum Vitae	Reviewed	1
Live Oak	Reviewed	1
Loblolly Pine	Reviewed	1
Mahogany	Reviewed	1
Merbau	Reviewed	1
Mesquite	Reviewed	1
Monkeypod	Reviewed	1
Norway Spruce	Reviewed	1
Osage Orange	Reviewed	1
Pacific Madrone	Reviewed	1
Paper Birch	Reviewed	1
Paulownia	Reviewed	1
Pear	Reviewed	1
Pecan	Reviewed	1
Persimmon	Reviewed	1
Pin Oak	Reviewed	1
Ponderosa Pine	Reviewed	1
Port Orford Cedar	Reviewed	1
Purpleheart	Reviewed	1
Quaking Aspen	Reviewed	1
Radiata Pine	Reviewed	1
Red Alder	Reviewed	1
Red Elm (Slippery Elm)	Reviewed	1
Red Mulberry	Reviewed	1
Red Oak	Reviewed	1
Redwood	Reviewed	1
River Birch	Reviewed	1
Sapele	Reviewed	1
Sassafras	Reviewed	1
Scots Pine	Reviewed	1
Sitka Spruce	Reviewed	1
Snakewood	Reviewed	1
Soft Maple	Reviewed	1
Southern Magnolia	Reviewed	1
Southern Yellow Pine	Reviewed	1
Spanish Cedar	Reviewed	1
Sugar Pine	Reviewed	1
Sweetgum (Redgum)	Reviewed	1
Teak	Reviewed	1
Wenge	Reviewed	1
Western Hemlock	Reviewed	1
Western Larch (Tamarack)	Reviewed	1
Western Red Cedar	Reviewed	1
White Ash	Reviewed	1
White Fir	Reviewed	1
White Oak	Reviewed	1
Yellow Birch	Reviewed	1
Yellow Poplar	Reviewed	1
Yellowheart	Reviewed	1
Zebrawood	Reviewed	1