Free Construction Calculators

Accurate tools for contractors, builders, and DIY homeowners. No signup required.

Board Foot Calculator

Calculate lumber volume in board feet by thickness, width, and length.

Find how many wall studs you need for any wall length and stud spacing.

Convert roof pitch to angle, calculate rise and run for any roof slope.

Calculate rebar quantity, spacing, and total weight for slabs and footings.

Estimate bricks and mortar needed for walls, patios, and walkways.

Calculate flooring materials for any room with waste factor included.

Calculate how many bags or tons of sand you need by area and depth.

Estimate asphalt tonnage for driveways, parking lots, and roads.

All calculators use standard industry formulas. Results match professional estimation software — without the price tag.