All calculators

Choose a tool below to start planning your next building project. More calculators are added regularly.

Deck and porch

Plan your deck, step by step

Deck board calculator

Calculate boards, screws, gap spacing, and waste factor.

Deck framing calculator

Joists, beams, span lengths, and structural layout.

Stair calculator

Rise, run, total height, and stringer measurements.

Railing calculator

Posts, balusters, top rails, and safety spacing.