Home improvement guides
Clear, practical answers to the questions you have before a project starts — each one paired with a free calculator to do the math for you.
How much do I need?
All calculators →The quantity answers the calculators automate — formulas, worked examples, and charts by size.
How much paint do I need to paint a room?
The simple formula, a worked example, and a quick reference by room size.
Read guide →How much paint for a 12×12 room?
About 2 gallons for two coats — the quick math and a chart by room size.
Read guide →How to calculate square footage
Length × width, plus L-shapes, triangles, and circles, and converting to yards and meters — with an example.
Read guide →How to measure a room for flooring
Step-by-step measuring, handling odd shapes, and converting to boxes.
Read guide →How many tiles for a 12×12 room?
About 159 of the 12×12 tiles incl. 10% waste — count by tile size.
Read guide →How many rolls of wallpaper do I need?
Measuring walls, single vs. double rolls, and pattern-repeat waste.
Read guide →How much concrete do I need for a slab?
The cubic-yard formula, thickness recommendations, and bags vs. ready-mix.
Read guide →How many bags of concrete for a 10×10 slab?
About 1.2 cubic yards — roughly 56 bags of 80 lb, or a small ready-mix load.
Read guide →How much concrete per fence post?
About 2 bags of 80-lb mix for a typical 4×4 — the hole-volume formula and a bags-per-hole chart by width and depth.
Read guide →How much gravel do I need?
Volume to tons, recommended depths, and buying bulk vs. bags.
Read guide →How much gravel for a driveway?
About 7 tons for a 2-car driveway at 4 inches — a chart by size and depth.
Read guide →How much mulch do I need?
Area × depth ÷ 324 = cubic yards (~13.5 bags a yard) — a chart by bed size, the right depth, and bulk vs. bags.
Read guide →How much sod for a yard?
Order your lawn area plus ~5% — pallets and cost by yard size, with the math.
Read guide →How many pavers for a 12×12 patio?
About 159 of the 12×12 pavers (plus ~10% waste) — count by paver size.
Read guide →How many deck boards do I need?
Board coverage, gaps, screws, and what framing to plan separately.
Read guide →How many fence posts do I need?
The formula, spacing, corners and gates, and concrete per post.
Read guide →How many studs for a wall?
The formula (length ÷ spacing + 1), a chart by wall length, and the plates and extras to add.
Read guide →How much epoxy for a 2-car garage?
About 400 sq ft — roughly two 2-car kits for two coats, plus cost by garage size.
Read guide →How to measure roof pitch
Rise per 12 in of run with a level, speed square, or phone — plus a pitch-to-angle and slope-factor chart.
Read guide →What size air conditioner do I need?
Size an AC by room area at ~20 BTU/sq ft — a chart in BTU and tons, plus adjustments.
Read guide →What it costs
How we estimate →Realistic installed-price breakdowns by material and project size, with the DIY-vs-pro math.
How much does it cost to install flooring?
Installed cost by material and labor per square foot, by room size — plus DIY savings.
Read guide →How much does it cost to tile a floor?
A realistic cost breakdown for materials, labor, and where to save.
Read guide →How much does carpet cost?
Carpet, padding, and installation costs — and how to estimate.
Read guide →How much does it cost to paint a house?
Interior and exterior cost per square foot, by house size and by room — plus DIY savings.
Read guide →How much does it cost to drywall a room?
Cost per square foot and per sheet to hang, tape, and finish — by room size, plus DIY.
Read guide →How much does it cost to insulate?
Cost by type — batts, blown-in, spray foam — and by attic size, plus DIY savings.
Read guide →How much do countertops cost?
Installed cost by material — laminate to marble — plus cost by kitchen size and DIY savings.
Read guide →How much does a new roof cost?
Cost by material, labor, and tear-off — plus how to estimate yours.
Read guide →How much do gutters cost?
Gutter cost by material — vinyl to copper — per foot and by home size, plus guards and DIY.
Read guide →How much does it cost to build a deck?
Deck cost by material and size, plus the railings, stairs, and labor that move the price.
Read guide →How much does it cost to install a fence?
Fence cost by material and length, plus gates, terrain, permits, and DIY savings.
Read guide →How much does it cost to pave a driveway?
Driveway cost by material — gravel, asphalt, concrete, pavers — and by size.
Read guide →X vs. Y comparisons
Two materials, one decision — cost, durability, and which to choose, side by side.
Laminate vs. vinyl flooring
Cost, water resistance, durability, and feel compared — plus which to choose room by room.
Read guide →Laminate vs. hardwood flooring
Cost, looks, durability, refinishing, and resale value compared — with a clear pick.
Read guide →Laminate vs. tile flooring
Cost, water resistance, durability, comfort, and install compared — room by room.
Read guide →Quartz vs. granite countertops
Cost, maintenance, heat and stain resistance, looks, and resale compared — with a clear pick.
Read guide →Metal roof vs. shingles
Cost, lifespan, durability, energy use, noise, and resale compared — with a clear recommendation.
Read guide →Vinyl vs. fiber cement siding
Cost, durability, maintenance, fire resistance, and resale compared — with a clear pick.
Read guide →Composite vs. wood deck
Cost, maintenance, lifespan, heat, and looks compared — with the lifetime-cost math and a clear pick.
Read guide →Sod vs. seed
Cost, time to a lawn, effort, and results compared — with a clear pick for your yard.
Read guide →Garage floor paint vs. epoxy
Cost, durability, prep, and lifespan compared — with the value-over-time math and a verdict.
Read guide →Polymeric sand vs. regular sand
Paver joint sand compared on cost, weeds, washout, and longevity — plus which sand goes where.
Read guide →Pavers vs. concrete patio
Cost, cracking, repairs, looks, and climate compared — with a clear pick for your yard.
Read guide →Asphalt vs. concrete driveway
Cost, lifespan, maintenance, and climate compared — with a clear recommendation.
Read guide →Bags vs. ready-mix concrete
When to mix bags yourself vs. order a truck — the cost crossover and bags per yard.
Read guide →Step-by-step how-tos
Full project walkthroughs, each with the quantities to buy before you start.
How to tile a floor
Substrate prep, layout, setting and spacing tiles, cutting, and grouting — start to finish.
Read guide →How to epoxy a garage floor
Prep and profile the concrete, then roll on base and clear coats — with how much epoxy to buy.
Read guide →How to install a paver patio
Excavate, build a compacted base, screed the sand, set the pavers, and lock the joints.
Read guide →How to build a retaining wall
Compact the base, level the first course, stack with setback, and drain it — for a lasting block wall.
Read guide →How to install a French drain
Plan the slope, dig the trench, and layer gravel, perforated pipe, and fabric to move water away.
Read guide →How to seal a driveway
When to sealcoat, how much sealer to buy, and a step-by-step.
Read guide →How to install drip irrigation
From the faucet hookup to tubing, emitters, and a timer — a no-dig afternoon project.
Read guide →How to install vinyl siding
Starter strip, corners, and J-channel — then nailing the courses loosely so they can expand.
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