Square Footage Calculator
Find the area of rectangular, circular and triangular spaces in square feet.
CalculateAll Tools
25 calculators for estimating materials and sizes. Each one shows its formula and a worked example, so you can check the numbers yourself.
25 tools shown
Concrete Calculator
Estimate cubic yards and bags of concrete for slabs, pads and footings.
CalculatePaint Calculator
Work out gallons of paint for a room from wall area, coats and coverage.
CalculateFlooring Calculator
Convert room size into square feet, boxes and cost for plank, laminate or vinyl.
CalculateTile Calculator
Count the tiles needed for a floor or wall, including grout joints and waste.
CalculateRoofing Calculator
Find roof area, roofing squares and bundles from house size and pitch.
CalculateRoof Pitch Calculator
Convert rise and run into pitch, angle in degrees, slope percent and multiplier.
CalculateStair Calculator
Work out risers, treads, total run and stringer length for a straight stair.
CalculateGravel Calculator
Estimate cubic yards and tons of gravel, stone or sand for a given area and depth.
CalculateCubic Yard Calculator
Convert length, width and depth into cubic yards, cubic feet and cubic meters.
CalculateAir Conditioner BTU Calculator
Size a room or window air conditioner in BTU from room size, sun and occupancy.
CalculateDrywall Calculator
Estimate drywall sheets, joint compound, tape and screws for a room.
CalculateFence Calculator
Count posts, rails, pickets and concrete bags for a wood fence run.
CalculateDecking Calculator
Estimate deck boards, joists and screws from deck size and board dimensions.
CalculatePaver Calculator
Count pavers and estimate base gravel and bedding sand for a patio or path.
CalculateCarpet Calculator
Estimate carpet in square yards and linear feet of roll, with optional cost.
CalculateWallpaper Calculator
Work out how many rolls of wallpaper a room needs, including pattern repeat.
CalculateBrick Calculator
Count bricks for a wall from its size, brick dimensions and mortar joint.
CalculateConcrete Block Calculator
Estimate concrete blocks (CMU) and mortar for a wall or foundation.
CalculateMortar Calculator
Estimate bags of mortar mix for brick or block walls of any size.
CalculatePool Calculator
Calculate pool volume in gallons and liters for rectangular, round and oval pools.
CalculateInsulation Calculator
Find the insulation depth and volume needed to reach a target R-value.
CalculateLumber Calculator
Calculate board feet, linear feet and cost for dimensional lumber.
CalculateRoof Shingle Calculator
Turn roof area into shingle bundles, underlayment, ridge caps and nails.
CalculateFurnace Size Calculator
Estimate furnace size in BTU from floor area, climate, insulation and efficiency.
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