Construction Calculators
Last updated: October 2026
Excavation Volume Calculator
Calculate the volume of earth to be removed for a rectangular excavation — foundation pit, trench, or basement cut.
Flooring Calculator
Work out how much flooring to buy and what it will cost: square feet with waste, boxes, material cost or total installed cost for laminate, vinyl plank, hardwood, tile or stone.
Insulation Cost Calculator
Estimate what an insulation job will cost from the area, the material price per square foot at your chosen R-value and the installer's labor rate, with an allowance for waste and trimming.
Roofing Material Calculator
Estimate shingle bundles and roofing squares from the building's footprint and roof pitch.
Concrete Slab Bag Calculator
Find out how many bags of pre-mixed concrete you need to pour a slab.
Tile Quantity Calculator
Count the tiles, square feet or boxes of tile you need for a floor or wall.
HVAC BTU Room Sizing Calculator
Size a window or room air conditioner with the ENERGY STAR chart: cooling capacity in BTU per hour from the room's floor area, adjusted for sun, extra occupants and kitchen use.
Brick Quantity Calculator
Estimate how many bricks a single-wythe wall needs from its length and height in feet, minus door and window openings, for modular, standard, king and other US brick sizes with 3/8 in mortar joints.
Drywall Calculator
Count the drywall sheets for a room: wall area from the perimeter and height, plus the ceiling if you want it, minus doors and windows, with a waste allowance, in 4×8, 4×10 or 4×12 sheets.
Excavation Calculator
Calculates the cubic yards of soil to be removed and the total excavation cost for foundations, trenches, or grading projects.
Paint Coverage Calculator
Calculate the exact number of paint gallons required for any surface area, factoring in multiple coats and a configurable waste allowance.
Asphalt Calculator
Estimate how many tons of hot-mix asphalt a driveway, path or parking area needs from its length, width and compacted thickness, with a density and waste allowance.
Concrete Volume Calculator
Work out how much concrete a slab, patio, footing or driveway needs.