100% in-browser
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.
📦Cubic Yards Calculator
Convert length, width and depth in any unit to cubic yards, cubic feet and cubic meters, with an optional cost.
📐Square Footage Calculator
Calculate area in square feet, square meters and square yards from length and width in any unit, plus cost.
🪨Gravel / Aggregate Calculator
Estimate gravel, crushed stone, sand or topsoil in cubic yards, US tons and metric tonnes by weight.
🎨Paint Calculator
Work out how many gallons or liters of paint a room needs from wall size, coats, doors and windows.
▦Tile Calculator
Find how many tiles and boxes a floor or wall needs, accounting for grout gaps and a waste allowance.
▤Flooring / Laminate Calculator
Calculate how many boxes of laminate, vinyl or hardwood flooring a room needs, with waste and cost.
⬜Drywall / Sheetrock Calculator
Estimate drywall sheets, screws, joint tape and mud from wall and ceiling area with a waste allowance.
🧱Brick & Block Calculator
Estimate how many bricks or blocks a wall needs, plus mortar bags, from wall size, brick type and waste.
❄️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.
🪜Stair Calculator
Work out the number of steps, riser height, run and stringer length from the total rise, with a code check.
🏠Roofing Calculator
Estimate roof area, roofing squares and shingle bundles from footprint size, roof pitch and waste.
🚧Fence Calculator
Estimate posts, sections, rails, pickets and concrete bags for a fence from length, spacing and picket size.
🪵Board Foot Calculator
Calculate board feet for lumber from thickness, width and length, with quantity and optional cost.
🛢️Tank Volume Calculator
Find a tank's full volume in gallons, liters and cubic feet, plus partial fill volume, for cylinder or box shapes.