Free tools
Material & quantity calculators
How much material does your project need? Enter your dimensions and get an honest estimate — cubic yards, bags, tons, or gallons — with the exact formula and the published coverage rates we used. No sign-up, no email.
Concrete & masonry
- Concrete slab & footing calculatorEstimate the concrete volume for a rectangular slab or footing in cubic yards (for ready-mix delivery) and in 40/60/80 lb bags (for small pours). Add an overage so you don't run short mid-pour.
- Concrete footing & sonotube calculatorEstimate the concrete for round column footings — deck piers, fence-post tubes, Sonotube forms — in cubic feet, cubic yards, and 60/80 lb bags. Enter the tube diameter, the pour depth, and how many footings.
Landscaping & hardscape
- Paver calculator — pavers, base & sandEstimate pavers, compacted crushed-stone base, bedding sand, and polymeric sand from your patio or walkway area. The waste control represents the pattern allowance: 10% straight, 15% diagonal, or about 22% circular/fan.
- Gravel & crushed stone calculatorEstimate gravel or crushed stone for a driveway, path, or base layer — in cubic yards and in tons (how it's usually sold and delivered).
- Mulch & topsoil calculatorEstimate mulch or topsoil for a bed in cubic yards (for bulk delivery) and in 2 ft³ bags. Mulch is usually applied 2–3 inches deep.
- Topsoil & garden soil calculator — cubic yardsEstimate topsoil or garden soil by cubic yard and bag count from the area and depth. The 324 rule converts square feet at an inch depth directly into cubic yards.
- Sod calculator — pallets & rollsEstimate sod pallets and rolls from lawn area. The waste control should be 5% for rectangular lawns or 10% for irregular yards with curves and bed edges.
- French drain gravel calculator — tons + yardsEstimate washed stone for a French drain by trench volume minus the pipe displacement, then convert cubic yards to tons using a supplier density.
Roofing
- Roof shingle calculator — squares + bundlesEstimate field shingles from a building footprint and roof pitch. It converts plan area to sloped roof area, then to roofing squares and shingle bundles.
- Roof pitch & area calculatorTurn your home's footprint and roof pitch into the actual sloped roof area — the number the shingle calculator needs. The pitch multiplier is pure right-triangle geometry, so a steeper roof has more surface than the floor beneath it.
Paint & drywall
- Interior paint calculatorEstimate interior wall paint in gallons from the wall area and number of coats. Coverage assumes a smooth, primed surface at roughly 350 sq ft per gallon.
- Drywall calculator — sheets, mud & tapeEstimate drywall sheets plus approximate joint compound, tape, and screws from total board area. Sheet count is solid; finishing materials vary by finish level.
- Wallpaper calculator — rollsEstimate wallpaper rolls from wall area, door/window deductions, roll coverage, and pattern waste. Wallpaper is often priced as a single roll but sold as double rolls.
- Exterior paint calculator — gallonsEstimate exterior body paint from wall area, openings, coats, and surface coverage. Rough siding and stucco cover far less per gallon than smooth primed surfaces.
Flooring & tile
- Tile calculator — tiles, thinset & groutEstimate tile pieces plus approximate thinset and grout from project area, tile size, trowel coverage, and joint width. Thinset and grout are chart-based estimates; confirm on the actual bag.
- Flooring box calculator — LVP, laminate & hardwoodEstimate flooring boxes from room area, the square feet per box printed on your product label, and a layout waste allowance.
- Baseboard & trim calculator — linear feet + piecesEstimate baseboard or trim length and stick count from room perimeter, door deductions, stick length, and trim waste for miters and copes.
Fencing & decking
- Fence calculator — posts, panels & concreteEstimate fence posts, equal sections, panel or picket counts, and concrete from the run length and post-hole dimensions. Concrete uses annular volume: hole volume minus buried post volume.
- Deck board calculator — boards & screwsEstimate decking board count, total decking linear feet, and exposed screw count from deck dimensions, board width/gap, joist spacing, and board length.
- Deck joist calculator — joist countCount deck joists at a selected on-center spacing. This deliberately does not size joists; span, species, loads, and ledger attachment are structural/code questions.
- Stair & stringer calculator (IRC)Enter your total height (finished floor to finished floor, or ground to deck) and this lays out a code-compliant stair: number of risers, exact riser height, number of treads, total run, and stringer length. Riser and tread limits come from the International Residential Code.
- Wheelchair ramp slope calculator (ADA)Enter the height the ramp has to climb and this returns the minimum ramp length at the ADA's 1:12 maximum slope, plus how many runs and level landings the rise requires. Built from the 2010 ADA Standards.
- Board foot calculator (lumber)Convert your lumber dimensions into board feet — the unit hardwood and rough lumber are priced in. Enter the nominal thickness, width, length, and how many boards. One board foot is 144 cubic inches (1 ft × 1 ft × 1 in).
Plumbing
- Pipe run estimator — length + fittings (planning aid)Estimate pipe length from a measured run plus slack, with a rough fitting count for shopping discussion only. It is not a plumbing design or code sizing calculator.
- Water heater size calculator (First Hour Rating)Size a storage (tank) water heater the way the U.S. Department of Energy recommends — by First Hour Rating (FHR), the gallons of hot water it delivers in a busy first hour. Add up the hot-water uses in your single busiest hour and get the minimum FHR to look for on the EnergyGuide label.
Insulation
Heating & cooling
Why these are different
Most online calculators hide their math. Ours show the exact formula, every coverage rate with its source, and the waste factor we applied — so you can check our work and adjust it to your project. That's the same radically-honest approach behind the rest of ProFix Directory.