Construction & Home Tools

Free construction, home-improvement and DIY calculators that run entirely in your browser — concrete and cubic yards, square footage, gravel, paint, tile, flooring, drywall, brick, BTU sizing, stairs, roofing, fencing, board feet and tank volume. Estimate materials before you buy. Nothing is uploaded.

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Concrete Calculator

Estimate concrete for a slab in cubic yards, cubic feet, cubic meters and 60 lb / 80 lb pre-mix bags.

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Cubic Yards Calculator

Convert length, width and depth in any unit to cubic yards, cubic feet and cubic meters, with an optional cost.

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Square Footage Calculator

Calculate area in square feet, square meters and square yards from length and width in any unit, plus cost.

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Gravel / Aggregate Calculator

Estimate gravel, crushed stone, sand or topsoil in cubic yards, US tons and metric tonnes by weight.

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Paint Calculator

Work out how many gallons or liters of paint a room needs from wall size, coats, doors and windows.

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Tile Calculator

Find how many tiles and boxes a floor or wall needs, accounting for grout gaps and a waste allowance.

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Flooring / Laminate Calculator

Calculate how many boxes of laminate, vinyl or hardwood flooring a room needs, with waste and cost.

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Drywall / Sheetrock Calculator

Estimate drywall sheets, screws, joint tape and mud from wall and ceiling area with a waste allowance.

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Brick & Block Calculator

Estimate how many bricks or blocks a wall needs, plus mortar bags, from wall size, brick type and waste.

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BTU / AC & Heater Sizing Calculator

Estimate the cooling and heating BTU/hr a room needs and the AC tonnage, from area, ceiling, sun and occupants.

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Stair Calculator

Work out the number of steps, riser height, run and stringer length from the total rise, with a code check.

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Roofing Calculator

Estimate roof area, roofing squares and shingle bundles from footprint size, roof pitch and waste.

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Fence Calculator

Estimate posts, sections, rails, pickets and concrete bags for a fence from length, spacing and picket size.

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Board Foot Calculator

Calculate board feet for lumber from thickness, width and length, with quantity and optional cost.

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Tank Volume Calculator

Find a tank's full volume in gallons, liters and cubic feet, plus partial fill volume, for cylinder or box shapes.

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Feet & Inches Calculator

Add, subtract, multiply or divide feet-and-inches measurements with fractions and convert the result to decimal feet, meters and centimeters.

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Mulch Calculator

Calculate how much mulch you need in cubic yards and cubic feet, the number of bags, and total cost from area and depth.

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Asphalt Calculator

Estimate how many tons of asphalt you need for a driveway or lot from area, thickness and mix density, plus volume and cost.

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Roof Pitch Calculator

Convert roof rise and run into pitch (x:12), angle in degrees, slope factor and percent grade.

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Wallpaper Calculator

Estimate how many wallpaper rolls a room needs, allowing for pattern repeat and door/window openings.

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Grout & Thinset Calculator

Estimate pounds and bags of grout plus bags of thinset mortar for a tile job from tile size, joint width, thickness and area.

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Insulation Batt & Roll Calculator

Work out how many insulation batts, rolls or loose-fill bags you need to reach a target R-value, plus the recommended thickness.

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Gutter & Downspout Sizing Calculator

Size gutters and downspouts from roof drainage area, pitch and rainfall intensity, and count the downspouts and linear feet needed.

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Rebar & Tie Wire Calculator

Count rebar bars, total linear feet, weight and tie wire for a slab or footing grid at a given spacing, including lap splices.

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Retaining Wall Block Calculator

Estimate segmental retaining-wall blocks, cap blocks, base gravel and drainage backfill from wall length and height.

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Ramp Slope & ADA Compliance Calculator

Compute ramp run, slope ratio, percent grade and angle from a rise, and check it against ADA 1:12 limits with landing requirements.

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Fence Post Concrete Calculator

Work out the concrete volume and the number of 40, 50, 60, or 80 lb bags needed to set fence posts, per hole and for the whole fence line.

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Trim & Molding Linear-Foot Calculator

Calculate baseboard, crown, chair-rail, or casing linear feet from a room's perimeter, subtracting door openings and adding waste and stock-length counts.

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