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.
Open calculator →Deck framing calculator
Joists, beams, span lengths, and structural layout.
Open calculator →Stair calculator
Rise, run, total height, and stringer measurements.
Open calculator →Railing calculator
Posts, balusters, top rails, and safety spacing.
Open calculator →