Carpentry Calculators
Free calculators for the numbers carpenters work out on every job: how much lumber to order and how steep the roof is.
Each tool explains its formula and walks through a worked example, so you can check the answer with a pencil and a framing square.
Framing and Roofing
Pitch, rafter multipliers and roofing squares.
Lumber
Board feet, waste and cost for framing lumber and hardwood.