Material calculators for home projects
Enter your measurements, get a materials list with quantities rounded to what you can actually buy, and a cost range at prices you can change. Every page shows its formulas and a worked example.
Decks, fences & hardscape
- DeckDeck boards, joists, screws, posts and footing concrete for a rectangular deck.
- FencePosts, rails, pickets and post-hole concrete for a straight wood fence.
- ConcreteCubic yards and 60 lb or 80 lb bag counts for a slab or round footings.
- PaversPavers, compacted gravel base and bedding sand for a patio or walkway.
- Retaining wallWall blocks, cap blocks, base gravel and drainage stone for a segmental block wall.
Landscaping
Walls & ceilings
- DrywallDrywall sheets, joint compound, tape and screws for a room.
- PaintGallons of wall paint, ceiling paint and primer for a room.
- WallpaperRolls of wallpaper by the strip method, with pattern repeat and trim allowance.
- InsulationPackages of fiberglass batts or rolls for walls, floors or an attic, adjusted for framing.
Floors
Roofing
- RoofingRoof squares from footprint and pitch, then shingle bundles, underlayment, ridge cap and drip edge.
Quantities first
Each calculator works out what you need in the units stores sell: boards, bags, boxes, rolls, bundles, cubic yards. Quantities are rounded up, never down.
Your prices
Default prices are ballpark U.S. home-center figures. Change any of them and the estimate updates; the low–high range is ±15% unless you set it otherwise.
Open math
The formulas are printed on every page and published at /api/calculators.json, so you can check the work.