✓ 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 →New
Roof Calculator
Squares and shingle bundles from your footprint and pitch, plus underlayment and drip edge.
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 →Pool & Water Calculators
Know what you're treating
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.
Best Waterproof Laminate Flooring for Pets in 2026
The best waterproof laminate flooring for pets researched and compared for 2026 — honest pros, cons, and what each one is actually for.
Best Paint for Bathroom Walls and Ceiling in 2026
The best paint for bathroom walls and ceiling researched and compared for 2026 — honest pros, cons, and what each one is actually for.
Best Paint for Bathroom Cabinets Without Sanding in 2026
The best paint for bathroom cabinets without sanding researched and compared for 2026 — honest pros, cons, and what each one is actually for.
Paint Roller Leaving Marks and Streaks? Here's the Fix (2026)
Roller marks and streaks on a freshly painted wall come from the cover, the load, or lost wet edge. The fix is a light sand and one proper recoat. Here is the exact order, plus the technique change that keeps it from happening again.
Why Is My Concrete Cracking? Normal vs. Not
Hairline cracks in new concrete are normal shrinkage; wide or offset cracks are a subgrade problem. How to tell the difference and what to fix.
Paint Not Covering in One Coat? Causes and Fixes
One-coat coverage is mostly marketing. If new paint is ghosting, streaking, or flashing over the old color, one of four causes is at fault.
Why Is My Paint Peeling Off the Wall? Causes & Fixes
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 darker than the sample chip? What actually lightens it, what doesn't, and the strip-brighten-restain process that fixes it for good.
Best Exterior House Paint 2026: Durability & Coverage
Exterior house paint compared: Sherwin-Williams Emerald, Behr Marquee, Benjamin Moore Aura, and Behr Premium Plus, ranked on durability and value.
Why Is My Deck Stain Blotchy? Causes and Fixes (2026)
Blotchy deck stain usually comes from over-application or wood that wasn't ready to absorb. How to tell which, and how to fix it without stripping.
Best Luxury Vinyl Plank Flooring 2026: Top Brands
Luxury vinyl plank flooring for 2026, with top brands grouped by household: Shaw Floorte Pro, COREtec, LifeProof, Mohawk SolidTech, and Pergo.
Deck Stain Still Tacky and Not Drying? How to Fix It (2026)
Deck stain still sticky days later means the wood couldn't absorb it. 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 Fixes
Peeling deck stain means the finish sat on top of the wood instead of soaking in. Why film-forming stains fail, and how to strip and redo it right.
How to Stain a Deck: Prep, Method & Products (2026)
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 2026: Sealing 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. The tools and techniques for straight scores, mid-sheet cutouts, and tight edges, and what to skip.
Best Vinyl Plank Flooring of 2026
Vinyl plank flooring for 2026: an honest look at SPC vs WPC, wear layers, which brands you buy where, and the tools you 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 coverage numbers and when to spend more.
Best Paint for Interior Doors 2026: Hard-Drying Enamels
The best paints for interior doors in 2026, from furniture-smooth Benjamin Moore Advance to a fast-drying Behr budget pick, plus the right primer.
Best Composite Decking of 2026
Composite decking compared for 2026, from budget Trex Enhance to premium TimberTech AZEK PVC, with notes on heat, moisture, and warranties.
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 coverage.
Best Tile for a Bathroom Floor of 2026
The best tile for a bathroom floor in 2026: why textured porcelain wins on slip resistance, what DCOF and PEI mean, and the mosaic for showers.
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, and when new boards are dry enough.
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 deck, climate, and skill.
Best Deck Stain and Sealer 2026: Penetrating Picks
The deck stains and sealers worth buying in 2026, why penetrating semi-transparents beat film-forming finishes, and how to match one to your wood.
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 to budget hardwood and pine bark, plus how thick to spread it.
Best White Paint for Interior Walls in 2026
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 2026: Walls That 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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