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Free Home Projects Calculators

Use home project calculators to rough out material quantities before you shop, quote, or measure again. These tools make the math easier for paint, flooring, drywall, concrete, roofing, fencing, yard materials, and room planning while keeping the assumptions visible.

Plan material before you buy

Home project calculators are strongest when you measure carefully, choose the right unit, and add a realistic waste allowance for cuts, overlap, breakage, and mistakes.

I need concrete quantity Estimate cubic yards, bags, slab volume, and common project assumptions. I need paint coverage Estimate gallons from wall area, coats, doors, windows, and coverage rate. I need wallpaper rolls Include pattern repeat, wall size, roll coverage, and waste percentage. I need flooring material Estimate area and waste so cuts and layout do not surprise you later.
47

tools available

47

guides available

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Guides that prevent material mistakes

Project calculators are strongest when you understand waste, coverage, product labels, and site conditions before buying materials.

Priority guides

Concrete guide Slab volume, bag estimates, cubic yards, waste, and supplier checks. Paint guide Wall area, openings, coats, coverage rate, and why product labels matter. Wallpaper guide Waste percent, roll coverage, pattern repeat, openings, and dye lot checks. Flooring guide Area, waste, cuts, layout, and why room shape can change the order quantity.

What this category helps with

  • Material takeoffs for paint, drywall, flooring, fencing, deck planning, yard products, and outdoor projects.
  • Clear unit handling for square feet, cubic feet, cubic yards, gallons, bags, pieces, and tons.
  • Practical warnings for waste, supplier coverage, compaction, site conditions, and professional measurement.

Start with these tools

Concrete Calculator Estimate slab volume, cubic yards, cubic meters, and common 40, 60, and 80 lb bag counts. Roofing Calculator Estimate roof squares and shingle bundles from footprint, pitch, and waste. Tile Calculator Estimate floor, wall, or shower tile count from square feet, tile size, and waste. Mulch Calculator Estimate mulch cubic yards, cubic feet, and 2-cubic-foot bags from area and depth. Gravel Calculator Estimate gravel cubic yards and tons from length, width, depth, and density. Paint Calculator Estimate interior wall paint gallons from room size, openings, coats, coverage, and extra percent.

All home project calculators

Open a tool, try the examples, then use the matching guide when you need more explanation.

Concrete Calculator Estimate slab volume, cubic yards, cubic meters, and common 40, 60, and 80 lb bag counts. Open Roofing Calculator Estimate roof squares and shingle bundles from footprint, pitch, and waste. Open Tile Calculator Estimate floor, wall, or shower tile count from square feet, tile size, and waste. Open Mulch Calculator Estimate mulch cubic yards, cubic feet, and 2-cubic-foot bags from area and depth. Open Gravel Calculator Estimate gravel cubic yards and tons from length, width, depth, and density. Open Paint Calculator Estimate interior wall paint gallons from room size, openings, coats, coverage, and extra percent. Open Drywall Calculator Estimate drywall sheet count from project area, sheet size, and waste percentage. Open Carpet Calculator Estimate carpet square yards, adjusted area, and roll length from room size, roll width, and waste. Open Flooring Calculator Estimate flooring boxes, adjusted square feet, coverage ordered, and optional material cost. Open Wallpaper Calculator Figure out how many wallpaper rolls to buy, plus rough material cost when you add a roll price. Open Fence Calculator Estimate fence panels and posts from perimeter, panel width, post spacing, and gates. Open Deck Cost Calculator Estimate rough deck project cost from deck size, decking price, railing, stairs, and waste. Open Deck Board Calculator Estimate deck boards, fastener rows, deck screws, and optional board cost from deck and board dimensions. Open Deck Stain Calculator Estimate deck stain gallons from deck size, railings, steps, coat count, coverage, and waste. Open Baluster Calculator Estimate deck railing baluster count and equal open spacing after posts are subtracted from the rail run. Open Paver Calculator Estimate paver count from project area, paver dimensions, and waste percentage. Open Paver Base Calculator Estimate gravel base and bedding sand volume for patios, walkways, and paver projects. Open Polymeric Sand Calculator Estimate polymeric sand volume and bag count from paver area, paver size, joint width, and joint depth. Open Grass Seed Calculator Estimate grass seed pounds, bags, and optional cost from lawn area, seed rate, waste, and bag size. Open Lawn Mowing Calculator Estimate lawn mowing time from lawn area, mower width, mowing speed, and efficiency. Open Plant Spacing Calculator Estimate plants needed for a bed from bed size, plant spacing, and square or triangular layout. Open Siding Calculator Estimate siding squares from wall area, openings, waste, and optional price per square. Open Brick Calculator Estimate bricks from wall area, brick face size, mortar joint, and waste. Open Concrete Block Calculator Estimate CMU wall units, courses, and layout waste from wall size, openings, and nominal unit size. Open Rebar Calculator Estimate rebar grid counts, linear feet, and stock bars from slab size and spacing. Open Concrete Mix Calculator Estimate cement, sand, and gravel from concrete volume and a mix ratio. Open Concrete Driveway Calculator Estimate driveway concrete yards, bag counts, and rough material-only cost. Open Concrete Steps Calculator Estimate concrete yards and bag counts for solid steps with an optional landing. Open Concrete Weight Calculator Estimate concrete weight in pounds and US tons from cubic yards, density, and waste. Open Concrete Mesh Calculator Estimate welded wire mesh sheets for a rectangular concrete slab. Open Concrete Block Fill Calculator Estimate grout or concrete for filling CMU block cores. Open Retaining Wall Calculator Estimate segmental retaining wall blocks, caps, courses, and base gravel. Open Rebar Weight Calculator Estimate rebar weight from bar size, length, quantity, and waste. Open Concrete Footing Calculator Estimate concrete volume and bag counts for straight rectangular footings. Open Concrete Column Calculator Estimate concrete for round columns, piers, and tube forms. Open Post Hole Concrete Calculator Estimate concrete bag counts for fence, deck, and mailbox post holes. Open Plywood Calculator Estimate plywood sheet count, coverage, waste, and optional cost. Open Insulation Calculator Estimate insulation pack count from area, openings, package coverage, and waste. Open Countertop Calculator Estimate countertop square footage, backsplash area, waste, and optional material cost. Open Sod Calculator Estimate sod rolls, pallets, adjusted area, and optional cost. Open Wall Stud Calculator Estimate wall studs, plate pieces, and framing board count from wall layout. Open Board Foot Calculator Estimate board feet from lumber size, quantity, and actual board dimensions. Open Cubic Yard Calculator Convert length, width, depth, and waste into cubic feet and cubic yards. Open Pool Volume Calculator Estimate pool gallons from shape, length, width, and average depth. Open Sand Calculator Estimate sand cubic yards and tons from length, width, depth, density, and waste. Open Soil Calculator Estimate topsoil, garden soil, cubic yards, cubic feet, and common bag counts from area and depth. Open Asphalt Calculator Estimate asphalt tons from pavement size, compacted depth, density, and waste. Open

Guides for this category

Each guide uses its matching tool, with example numbers and plain limits.