Free construction calculatorsRoofing, siding, paint, flooring, framing.
Quick numbers for one roof, one wall or one room, with every step of the math shown. For the whole house, upload your plan set and we measure every trade on a 3D model.
Pick a calculator.
Free, no sign-up. Each one shows its formula and rounds up where you buy by the piece.

Roof squares calculator
Footprint, pitch and overhang to roof area, squares and bundles.
Roof pitch calculator
Rise and run to x/12, degrees, percent, pitch factor and rafter length.
Metal roof panel calculator
Panels per plane, cut length to the ½ inch, and trim pieces.
Siding calculator
Walls and gables to square feet, squares and lap pieces.
Paint calculator
Gallons and 5-gallon buckets for exterior walls or interior rooms.
Flooring calculator
Rooms to square feet with waste, and the boxes to buy.
Framing lumber calculator
Studs, cripples, headers and plates for a wall.Every result is an estimate from the numbers you enter. Plans and measurements don't show everything built on site. We recommend a site visit to confirm measurements and conditions before you order materials or sign a contract.
Skip the math —upload your plans.
Upload your plan set and we build the house in 3D and measure each trade off the model: roofing, siding, framing, electrical, plumbing, painting, flooring and finish carpentry. You spend about 10 minutes checking it against your plans.
Priced per plan seta trade, 3D model included