Roofing & Lumber Calculators

Timber is priced by board foot, a volume measure that trips people up because it uses nominal dimensions rather than actual ones. The board foot calculator converts thickness, width and length into board feet and total cost, and handles a mixed cut list in one go.

Roofing quantities depend on pitch as much as footprint — a steeper roof has considerably more surface than the building below it — so the roofing calculator works from pitch and plan area to squares of material, with waste for hips, valleys and starter courses.