Know exactly how much to buy.
Free calculators for concrete, paint, flooring, roofing, mulch, gravel and every other material your project needs. Instant answers, the math shown, no sign-up.
Concrete & Masonry
Concrete CalculatorCubic yards and 80/60/40 lb bags for slabs, footings and post holes.Paver CalculatorPavers, base gravel and bedding sand for patios and walkways.Brick CalculatorNumber of bricks and bags of mortar for a wall, planter or veneer.Concrete Block CalculatorNumber of 8×8×16 cinder blocks and mortar bags for a wall.Concrete Steps CalculatorConcrete volume and bags for solid poured steps with an optional landing.
Paint & Walls
Paint CalculatorGallons and quarts for walls and ceilings, minus doors and windows.Drywall CalculatorSheets of 4×8, 4×10 or 4×12 drywall plus screws for any room.Insulation CalculatorHow many inches of insulation reach R-30, R-49 or R-60, and how many bags.Wallpaper CalculatorSingle and double rolls of wallpaper for a room, adjusted for pattern repeat.
Flooring & Tile
Yard & Garden
Mulch CalculatorCubic yards and 2 or 3 cu ft bags for any bed size and depth.Gravel CalculatorTons and cubic yards of gravel, crushed stone or sand for driveways and paths.Raised Bed Soil CalculatorCubic feet, yards and bags of soil to fill one or more raised beds.Topsoil CalculatorCubic yards, tons and bags of topsoil for lawns, leveling and new beds.Sod CalculatorRolls and pallets of sod for a new lawn.Grass Seed CalculatorPounds of grass seed for a new lawn or overseeding, by grass type.Landscape Rock CalculatorTons and cubic yards of river rock, lava rock or decorative stone for beds.Sand CalculatorBags, cubic yards and tons of play sand or paver sand for any area.
Outdoor Building
Fence CalculatorPosts, rails, pickets and concrete bags for a wood privacy or picket fence.Deck Board CalculatorDeck boards, joists and screws for wood or composite decking.Roofing CalculatorRoof area, squares and shingle bundles from your house size and pitch.Deck Stain CalculatorGallons of deck stain or sealer for the floor and railings.
Measuring
Popular answers
Concrete for a 10×10 slabPaint for a 12×12 roomMulch for 500 sq ftGravel for a 12×50 drivewayHow thick is R-49?Soil for a 4×8 raised bedFlooring for a 12×12 roomMaterials for 100 ft of fenceBoards for a 12×16 deckPavers for a 200 sq ft patioShingles for a 2,000 sq ft houseGrass seed for an acre
Why people use CalcBeforeYouBuy
Buy once, not twiceEvery result includes a sensible waste allowance, so you don’t run out halfway or haul back a truckload of extras.
The math is shownEach calculator explains its formula and the standard values it uses, like bag yields and paint coverage — so you can double-check it.
Feet, inches & your pricesEnter measurements the way you take them, add today’s prices for a cost estimate, then share or print your shopping list.
2026 cost guides
How Much Does a Concrete Slab Cost?About $4–$8 per sq ft installed for a basic 4-inch slab — with a size chart.How Much Does a Roof Replacement Cost?Roughly $4–$11 per sq ft of roof for asphalt shingles — by roof size.How Much Does It Cost to Build a Deck?Commonly $30–$60 per sq ft built — by size and material.How Much Does a Fence Cost per Foot?Wood privacy fencing runs about $24–$45 per linear foot installed.How Much Does a Paver Patio Cost?About $8–$24 per sq ft installed — by patio size.How Much Does Interior Painting Cost?Roughly $2–$6 per sq ft of floor area for pro painting.How Much Does Vinyl Plank Flooring Cost?Roughly $3–$11 per sq ft installed for rigid-core LVP.How Much Does Sod Cost?Installed sod runs about $1–$2.60 per sq ft; pallets $150–$450.How Much Does a Gravel Driveway Cost?Typically $1–$3 per sq ft installed — with tonnage by size.
Popular guides
How Many Bags of Concrete Make a Yard?45 × 80 lb, 60 × 60 lb or 90 × 40 lb — plus a chart up to 10 yards.How Much Does a Gallon of Paint Cover?350–400 sq ft per coat on smooth walls — and when to expect less.What Is a Cubic Yard?27 cubic feet — and how to convert area and depth into yards.How Thick Should a Concrete Slab Be?4 inches for patios and sheds, 5–6 inches for driveways — with a volume chart.How to Measure a Room (Square Feet & Wall Area)Floor area, wall area and L-shaped rooms, step by step.How Deep Should Mulch Be?2–3 inches for most beds, 1 inch to refresh — and keep it off trunks.