Construction calculators
Concrete, tile, paint, and job-site quantities.
- Concrete Calculator: Volume, Cubic Yards and Bags Needed
Concrete for a slab in m³ or cubic yards, and how many 20–40 kg or 40–90 lb bags it takes.
- Paint Calculator: How Much Paint for a Room
Litres or gallons of paint from the wall area, the number of coats and the can's coverage.
- Tile Calculator: How Many Tiles Do I Need?
Tiles needed for a floor or wall from its area and the tile size, with spare tiles added.
- Flooring Calculator: Boxes of Laminate or Vinyl Needed
Boxes of laminate, vinyl or wood flooring for a room from its area and the coverage on the box.
- Brick Calculator: Bricks per m² and sq ft, With Mortar
How many bricks a wall takes for US modular, UK standard or any brick size, with waste and mortar.
- Roof Pitch Calculator: Angle, Slope and Pitch Multiplier
Roof pitch, angle, slope percent and the rafter multiplier from rise and run, with roof area and the IRC shingle rule.
- Drywall Calculator: How Many Sheets (4×8, 4×10, 4×12)
Drywall sheets for a wall or room from its size and the sheet size, with doors and windows taken off.
- Gravel Calculator: Cubic Yards, m³ and Tons
Gravel or sand for a path, driveway or base in m³ or cubic yards, and its weight in tonnes or tons.
- Stair Calculator: Risers, Treads and Code Check (US, Australia)
Risers, treads, total run and angle for a staircase, checked against the US IRC or Australia's NCC.
- Plywood Calculator: How Many Sheets (4×8 or 1200×2400)
Plywood or OSB sheets to cover a floor, roof or wall, in 4 × 8 ft or 1200 × 2400 mm sheets.
- Fence Calculator: Posts, Rails and Pickets
Fence posts, rail length and pickets for a run of fence from its length and spacing.
- Rebar Weight Calculator: kg/m and lb/ft by Bar Size
Rebar weight by bar size, length and count — metric 8–25 mm or US #3–#8 bars, in kg or lb.