About LumberMath

LumberMath covers the units wood is actually sold in: board feet, sheets, cords and pounds. Lumber yards, firewood sellers and sawmills each price differently, and the calculators turn your measurements into their unit so you can compare and check a price before you pay.

How the numbers are checked

The calculators use standard lumber trade measures (the board foot and the 128 cubic foot cord), the Doyle log rule, and green wood weights based on the USDA Forest Products Laboratory Wood Handbook. Every tool runs in your browser, and each page shows its formula so you can check the math yourself. Before publishing, every calculator is tested against worked examples, and pages are reviewed when standards or reference data change.

Limits

Results are estimates for planning. They do not replace a site survey, a qualified professional, or the rules that apply where you live.

Corrections

If a figure looks wrong, please contact us with the page and the value. Confirmed errors are fixed quickly.