✓ Waste factor included
✓ Full shopping list output
✓ Direct Amazon links
✓ Copy list to clipboard
Build Calculators
Pick your project
Live
Paint Calculator
Gallons, primer, rollers, tape — the full kit. Never under-buy or make a second run.
Calculate now →Flooring Calculator
Square footage, waste factor, underlayment, and transition strips — all in one list.
Calculate now →Tile Calculator
Floor or wall tile with grout lines, adhesive, and the tools everyone forgets.
Calculate now →Deck Calculator
Decking boards, joists, post concrete, and every piece of hardware for a solid build.
Calculate now →Drywall Calculator
Sheet count, joint compound, tape, screws — the full mudding kit.
Calculate now →Mulch & Topsoil
Cubic yards or bags for any bed depth. Landscape fabric and edging included.
Calculate now →Concrete Calculator
Slabs, footings, or post holes. Bags or yards — plus your mixing tools.
Calculate now →Fence Calculator
Posts, panels, concrete, post caps, and gate hardware for any fence run.
Calculate now →Maintenance Calculators
Keep it looking good
Lawn & Garden Calculators
Grow something great
New
Grass Seed Calculator
Pounds of seed, starter fertilizer, and straw cover — for new lawns, overseeding, or patch repair.
Calculate now →New
Raised Garden Bed Soil
Bags of soil, compost, and perlite to fill any raised bed. Premix or 60/30/10 DIY mix.
Calculate now →Interior Calculators
Finish the inside
How it works
01
Enter your dimensions
Length, width, height. Add multiple rooms or sections if needed. Takes 30 seconds.
02
Get the exact count
Waste factor built in. We round up correctly. No guessing, no rounding down.
03
Walk out with a list
Every item you need — with direct Amazon links — including the stuff you'd forget.
Why BuildGuiders
Built by someone who's
made that second trip.
made that second trip.
Lists, not just numbers
We tell you the gallons, the primer, the rollers, the tape. Everything that goes in the cart.
Waste factor built in
Cuts waste material. Odd-shaped rooms need extra. It's already accounted for.
Copy it, go
One tap copies your whole list as plain text. Paste in Notes or text it to whoever's making the run.
Works in the aisle
Mobile first. Pull it up standing in the store and get your answer in 30 seconds.
Shopping list output
What you actually get
Every item on your list links straight to Amazon — no hunting required.
Buying guides
Pick the right materials first
Honest, up-to-date picks for paint, decking, stain, tile and more — each guide ends with the matching calculator so you know exactly how much to buy.
Why Is My Concrete Cracking? What's Normal and What's Not (2026)
Hairline cracks in new concrete are normal shrinkage, and wide or offset cracks are a subgrade problem. How to tell the difference, fix the ones worth fixing, and pour the next slab so it cracks where you tell it to.
Paint Not Covering in One Coat? The Real Causes and Fixes (2026)
One-coat coverage is mostly marketing. If your new paint is ghosting, streaking, or flashing over the old color, one of four causes is at fault, and gray-tinted primer fixes the worst of them.
Why Is My Paint Peeling Off the Wall? Causes and Fixes (2026)
Paint peeling off the wall in sheets or flakes? Diagnose the failure in five minutes, then fix it for good with the right prep, primer, and repaint sequence.
Best Concrete Mix for Every Project in 2026
Which bagged concrete mix to buy in 2026 for slabs, fence posts, repairs, and resurfacing, with honest guidance on Quikrete vs Sakrete and when each one fits.
Deck Stain Came Out Too Dark? Here's How to Fix It (2026)
Deck stain looking way darker than the sample chip? What actually lightens it, what doesn't, and the strip-brighten-restain process that fixes it for good, with real coverage numbers.
Best Exterior House Paint: Tested Picks for Durability & Coverage (2026 Update)
The best exterior house paint, tested and compared — Sherwin-Williams Emerald, Behr Marquee, Benjamin Moore Aura, and Behr Premium Plus ranked by durability, coverage, and value. Updated for 2026.
Why Is My Deck Stain Blotchy? Causes and Fixes (2026)
Blotchy deck stain almost always comes from over-application or wood that wasn't ready to absorb. Here's how to tell which one happened, how to fix it without stripping, and when a full redo is the honest answer.
Best Luxury Vinyl Plank Flooring of 2026: Top Brands by Household
The best luxury vinyl plank flooring of 2026, with top premium brands grouped by household: Shaw Floorte Pro for abuse, COREtec for quiet, LifeProof for budget, Mohawk SolidTech for pets, Pergo Extreme for looks.
Deck Stain Still Tacky and Not Drying? How to Fix It (2026)
Deck stain that's still sticky days later means the wood couldn't absorb what you put down. Here's why it happens and how to fix it, from a simple wipe-down to a full strip.
Why Is My Deck Stain Peeling? Causes and How to Fix It (2026)
How to Stain a Deck in 2026: Prep, Method, and Products That Last
How to stain a deck in 2026: how to prep, the method pros use, which stains actually last, and a free calculator to size your order.
Best Primer for New Drywall in 2026: What Actually Seals Bare Board
A practical 2026 guide to priming new drywall, from the versatile Zinsser Bulls Eye 1-2-3 to budget PVA sealers, plus when a cheap PVA is all you need.
How to Cut Drywall: The Right Tool for Every Cut (2026)
How to cut drywall cleanly depends on the cut. Here are the tools and techniques that handle straight scores, mid-sheet cutouts, and tight edges, plus which ones are worth owning and which to skip.
Best Vinyl Plank Flooring of 2026
The best vinyl plank flooring for 2026, with an honest look at SPC vs WPC, wear layers, and which brands you buy at Home Depot, Lowe's, or online — plus the tools you actually need to install it.
The Best Paint for Interior Walls in 2026
The best paint for interior walls in 2026, from Sherwin-Williams Emerald to Benjamin Moore Aura, with honest coverage numbers and when the expensive can is worth it.
Best Paint for Interior Doors in 2026: Enamels That Dry Hard and Stay Smooth
The best paints for interior doors in 2026, from the furniture-smooth Benjamin Moore Advance to a fast-drying Behr budget pick, plus the primer slick old doors demand.
Best Composite Decking of 2026
The best composite decking of 2026, from budget Trex Enhance to premium TimberTech AZEK PVC, with honest notes on heat, moisture, warranties, and which board fits your yard.
Best Solid Deck Stains of 2026
The best solid color deck stains of 2026, from value Behr Premium to durable Cabot Acrylic and pro-grade Sherwin-Williams SuperDeck, with honest notes on coverage and where solid stain actually lasts.
Best Tile for a Bathroom Floor of 2026
The best tile for a bathroom floor in 2026: why textured porcelain wins on slip and water resistance, what DCOF and PEI actually mean, and the mosaic to use in the shower.
Best Exterior Paint for Wood in 2026
The best exterior paints for wood siding, trim, and bare boards in 2026, grouped by job, with honest catches on each and the primer step most people skip.
Best Deck Stain for Pressure-Treated Wood in 2026
The best deck stains for pressure-treated wood in 2026: why penetrating semi-transparent oils win on PT lumber, when new boards are dry enough to stain, and four stains that actually last.
Best Semi-Transparent Deck Stains of 2026
The best semi-transparent deck stains of 2026, from long-lasting TWP 1500 oil to easy water-based DEFY Extreme, sorted by your deck, your climate, and your skill level.
Best Deck Stain and Sealer (2026): Penetrating Picks That Actually Last
The deck stains and sealers worth buying in 2026, why penetrating semi-transparents beat film-forming finishes on a deck, and how to match the product to your wood. Includes coverage rates and the catch on each pick.
Best Mulch for Flower Beds in 2026: What to Buy and How Much
A practical guide to the best mulch for flower beds in 2026, from shredded cedar and Scotts Nature Scapes to budget hardwood and pine bark, plus how thick to spread it.
Best White Paint for Interior Walls in 2026: The Whites Designers Actually Use
The best white paints for interior walls in 2026, sorted by warm, clean, and bright, with LRV and undertone notes so you pick the right white for your light.
Best Interior Paint in 2026: What to Buy for Walls That Actually Hold Up
A practical guide to the best interior paints in 2026, from premium Benjamin Moore Aura to budget Behr, plus the primer most people forget to buy.
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