Construction & Home Calculators
Roofing, concrete, flooring, paint, and more · 13 calculators
Roofing & Framing4
Roofing Calculator
Calculate roofing materials needed — shingles, squares, underlayment, and ridge cap — for any roof shape and pitch.
Roof Pitch Calculator
Convert roof pitch between rise-over-run (x/12), degrees, and slope factor. Calculate rafter length from the run and pitch for any roof.
Pythagorean Theorem Calculator
Solve a right triangle with a² + b² = c². Find any missing side, plus the 3-4-5 method for squaring up foundations, decks, and walls.
Stair Calculator
Calculate stair rise, run, and stringer length from your total height. Get the number of steps and code-friendly riser and tread dimensions.
Woodworking2
Board Foot Calculator
Calculate board feet of lumber for woodworking projects from thickness, width, and length. Get total board feet and cost across multiple boards.
Decking Calculator
Calculate how many deck boards you need from your deck size, board width, and gap spacing. Includes board count, total linear feet, and waste allowance.
Materials & Quantities7
Concrete Calculator
Calculate cubic yards of concrete needed for slabs, footings, columns, and steps. Get material quantities and cost estimates.
Paint Calculator
Calculate how many gallons of paint you need for any room or surface. Accounts for doors, windows, and multiple coats.
Square Footage Calculator
Calculate the square footage of a room or area for rectangles, triangles, and circles. Add multiple areas and estimate material cost per square foot.
Brick Calculator
Calculate how many bricks you need for a wall from its area and the brick size, including mortar joints and a waste allowance.
Tile Calculator
Calculate how many tiles and boxes you need for a floor or wall from the area, tile size, and waste percentage. Get tile count and estimated cost.
Gravel Calculator
Calculate the cubic yards and tons of gravel or aggregate you need for a driveway, path, or area from its length, width, and depth.
Drywall Calculator
Calculate how many drywall sheets you need for a room from wall and ceiling area and sheet size, including a waste allowance and screw/joint estimates.