Know exactly how much to buy before you start.
Free, accurate calculators for paint, flooring, tile and more. Get the materials you need — and a real cost estimate — in seconds. No sign-up, no guesswork.
Start your project the right way
Pick a calculator below. Each one accounts for waste, coats, and real-world details — then estimates your cost.
Most popular: Paint · Concrete · Flooring · Tile · Square footage · Gravel · Drywall · Deck
Flooring & Tile
View category →Square Footage Calculator
Total square feet, yards, and meters for one room or a whole project.
Open calculator →Flooring Calculator
Square footage and boxes for laminate, vinyl, or hardwood — with waste.
Open calculator →Carpet Calculator
Square feet, square yards, and cost of carpet for any room.
Open calculator →Tile Calculator
How many tiles you need for any room and tile size, including waste.
Open calculator →Thinset Calculator
50 lb bags of thinset to set tile — coverage by trowel size, plus cost.
Open calculator →Grout Calculator
Pounds and bags of grout to fill tile joints, by tile and joint size.
Open calculator →Shower Pan Mud Calculator
60 lb bags of deck mud (dry-pack mortar) to build a shower pan, with cost.
Open calculator →Garage Floor Epoxy Calculator
Kits of epoxy to coat a garage floor — coats, coverage, and cost.
Open calculator →Paint & Interior
View category →Paint Calculator
How much paint for a room, including coats, doors, and windows.
Open calculator →Countertop Calculator
Square feet, linear feet, and cost of kitchen countertops by material.
Open calculator →Wallpaper Calculator
How many rolls you need for a room, with pattern-repeat waste.
Open calculator →Drywall Calculator
Sheets, screws, and joint compound for any room.
Open calculator →Joint Compound Calculator
Gallons and buckets of drywall mud to tape and finish, by area — with cost.
Open calculator →Baseboard Calculator
Linear feet and pieces of baseboard or trim for a room.
Open calculator →Crown Molding Calculator
Linear feet and pieces of crown molding for a room, with cost.
Open calculator →Drop Ceiling Calculator
Ceiling tiles, grid, and wall angle for a suspended ceiling, with cost.
Open calculator →Insulation Calculator
Bags or rolls of insulation for an attic, wall, or floor.
Open calculator →BTU Calculator
BTUs and AC tonnage to heat or cool a room of any size.
Open calculator →Concrete & Masonry
View category →Concrete Calculator
Cubic yards of concrete for slabs, footings, and posts.
Open calculator →Rebar Calculator
Rebar for a concrete slab grid — lengths, linear feet, weight, and cost.
Open calculator →Brick & Block Calculator
How many bricks or concrete blocks for a wall, plus mortar and cost.
Open calculator →Retaining Wall Calculator
Blocks and caps for a retaining wall of any size, with cost.
Open calculator →Stucco Calculator
Bags of base- and finish-coat stucco for a wall, with cost.
Open calculator →Driveways & Patios
View category →Paver Calculator
Pavers needed for a patio or walkway, plus the base to plan.
Open calculator →Paver Base Calculator
Crushed-stone base and bedding sand under a paver patio, with cost.
Open calculator →Paver Sand Calculator
Bedding sand and polymeric joint sand for a paver patio, in bags.
Open calculator →Asphalt Calculator
Tons of hot-mix asphalt for a driveway or lot, with volume and cost.
Open calculator →Gravel Calculator
Tons, cubic yards, and bags of gravel for driveways and paths.
Open calculator →Driveway Sealer Calculator
Pails of sealcoat to seal an asphalt driveway, with coats and cost.
Open calculator →Deck, Fence & Landscaping
View category →Deck Calculator
Deck boards and screws for any deck surface, with waste.
Open calculator →Deck Stain Calculator
Gallons of stain or sealer for a deck — railings, coats, and cost.
Open calculator →Fence Calculator
Posts and panels for a fence of any length, with cost.
Open calculator →Mulch & Soil Calculator
Cubic yards and bags of mulch, soil, or gravel for any bed.
Open calculator →Topsoil Calculator
Cubic yards, bags, and weight of topsoil for lawns, beds, and leveling.
Open calculator →Grass Seed Calculator
Pounds of grass seed (or sod) for a new lawn or overseeding.
Open calculator →Fertilizer Calculator
Pounds and bags of lawn fertilizer from the N-P-K number, with cost.
Open calculator →Drip Irrigation Calculator
Emitters, tubing, flow rate, and water use for a garden drip system.
Open calculator →Soaker Hose & Sprinkler Calculator
Soaker hose or sprinklers to cover a bed or lawn, run time, and water use.
Open calculator →French Drain Calculator
Gravel, pipe, and fabric for a French drain trench, with cost.
Open calculator →Excavation Calculator
Cubic yards of dirt to dig and haul, with soil swell and truckloads.
Open calculator →Pool Volume Calculator
Gallons your pool holds, plus weekly chlorine and monthly cost.
Open calculator →Framing & Lumber
View category →Wall Framing Calculator
Studs, plates, and total 2×4s to frame a wall at 16″ or 24″ on-center.
Open calculator →Floor Joist Calculator
How many floor joists at 12, 16, or 24″ on-center, with cost.
Open calculator →Plywood Calculator
How many 4×8 sheets of plywood or OSB for a subfloor or sheathing.
Open calculator →Board Foot Calculator
Total board feet and cost for any lumber order, by the piece.
Open calculator →Stair Calculator
Number of steps, riser height, and total run from your rise.
Open calculator →Roofing & Exterior
View category →Roofing Calculator
Roofing squares and bundles of shingles from your roof size.
Open calculator →Roof Pitch Calculator
Roof pitch, angle, slope percent, slope factor, and rafter length from rise and run.
Open calculator →Siding Calculator
Squares and boxes of vinyl siding for a house, with waste and cost.
Open calculator →Gutter Calculator
Gutter sections, downspouts, and hangers for your eaves, with cost.
Open calculator →Estimates you can actually trust
Built for real projects
Our formulas account for waste, extra coats, doors, and windows — not just raw square footage — so you buy the right amount.
Cost estimates included
See what your materials will actually cost. Prices are editable, so you can match your local store or a quote you already have.
Fast and private
Results update instantly in your browser. No account, no email wall, no spam — just the numbers you came for.
Not sure where to start?
Plain-English guides for common projects — each one hands off to the right calculator.
How much paint do I need?
The formula, a worked example, and a quick reference by room size.
Read guide →How to measure for flooring
Step-by-step measuring, odd shapes, and converting to boxes.
Read guide →What does tiling a floor cost?
A realistic breakdown of materials, labor, and ways to save.
Read guide →