Know exactly how much to buy before you head to the store.
Paint, tile, concrete, mulch, fencing and more — every calculator uses real industry formulas, states its assumptions, and builds in the right waste factor. No signup, no guesswork.
Browse the calculators⚡ Instant results🧰 No signup required🧮 Formulas explained💸 100% free
Pick your project
Every tool comes with a plain-English guide to the math behind it.
🎨PaintGallons for any room — doors and windows subtractedOpen calculator →🖼️WallpaperDouble rolls, with pattern-repeat waste built inOpen calculator →🔷TileTiles and square footage for any layoutOpen calculator →🪣GroutPounds and bags from tile size and jointsOpen calculator →🪛DrywallSheets, screws and tape for walls and ceilingsOpen calculator →🧣InsulationBatts and rolls from your package coverageOpen calculator →🪵FlooringBoxes of laminate, vinyl plank or hardwoodOpen calculator →📏Baseboard & TrimLinear feet and pieces, miter waste includedOpen calculator →🧱Concrete SlabCubic yards plus 80 lb and 60 lb bag countsOpen calculator →🪨GravelCubic yards and tons for driveways and pathsOpen calculator →🍂MulchYards and bags for beds at the right depthOpen calculator →🌱SodRolls and pallets for an instant lawnOpen calculator →🌾Grass SeedPounds of seed for new lawns or overseedingOpen calculator →🚧FencePosts, rails and pickets for any runOpen calculator →🪚Deck BoardsBoard rows and lengths for your deckOpen calculator →🪜StairsRiser height and tread count from total riseOpen calculator →✨EpoxyGallons from area and coating thicknessOpen calculator →
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Transparent formulas
Every coverage rate, waste factor and assumption is stated right on the page — nothing is a black box.
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Shop with confidence
Results come as real shopping quantities: cans, boxes, bags, rolls and boards — not just abstract numbers.
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Guides included
Each calculator pairs with a practical guide full of pro tips that save you money at checkout.