Estimate any job
before you buy a thing.
Free, no-nonsense calculators for concrete, lumber, roofing, drywall, flooring, paint, and more. Get the exact quantities and a rough cost — then walk into the supplier knowing precisely what to order.
- 12
- Free calculators
- $0
- Forever — no paywall
- 0
- Accounts or signups
- 2
- Unit systems (metric + imperial)
Every calculator, organized
Grouped by the kind of job you're estimating. Pick one to get started.
Concrete, lumber & landscaping
Volume and quantity estimates for the materials you order by the yard.
Walls, floors & surfaces
Area-based estimates for everything you cover, coat, or tile.
Drywall Estimator
Sheets, screws, mud, and tape for any room with deductions and waste.
Flooring Calculator
Estimate hardwood, laminate, vinyl, carpet, and tile materials and cost.
Paint Calculator
Estimate gallons, primer, and cost for walls and ceilings.
Tile Calculator
Tiles needed for floors, walls, and backsplashes with grout and waste.
Square Footage Calculator
Calculate area for rooms, yards, and irregular shapes in sq ft or meters.
Roofing, stairs & structures
Framing and exterior estimates that have to meet code and pitch.
Roofing Calculator
Roofing squares, shingles, underlayment, and material cost for any roof shape.
Roof Pitch Calculator
Convert pitch ratios, calculate rafter length, slope angle, and rise.
Stair Calculator
Riser count, tread depth, stringer length, and IRC code check.
Fence Calculator
Posts, rails, panels, and concrete for any fence length and style.
From measurement to materials list in three steps
Pick a calculator
Choose the material or job you're estimating — concrete, roofing, paint, and more.
Enter your dimensions
Type in lengths, areas, and a waste factor. Switch between metric and imperial freely.
Get quantities & cost
See exactly what to buy and a rough cost — then export a materials list to PDF.
Order once. Order right.
Ordering too little means a second trip to the supplier and a stalled job. Ordering too much wastes money and leaves you with material you can't return. A solid estimate up front avoids both.
Each calculator uses standard industry formulas and lets you add a waste factor for off-cuts and site conditions. Many also estimate a rough cost range and export a materials list to PDF — so you can walk into the supplier knowing exactly what to ask for.
No signup, no tracking
Calculators run in your browser. We don't ask who you are and we don't store your numbers.
Waste factors built in
Every estimate lets you pad for off-cuts and site irregularities, the way the pros do.
Export to PDF
Save or print a clean materials list to take to the yard or hand to a crew.
Frequently asked questions
Are these construction calculators really free?
Yes. Every calculator is 100% free, runs entirely in your browser, and needs no signup or account. There are no usage limits and nothing to install.
How accurate are the estimates?
The math is precise, but material estimates depend on the numbers you enter and real-world conditions like waste, off-cuts, and site irregularities. Each tool includes a waste-factor setting. Always confirm with a local supplier quote and your building code before ordering.
Do they work in metric and imperial units?
Most calculators support both feet/inches and meters/centimeters, and convert results between cubic yards and cubic meters where relevant.
Can I export or save my results?
Several estimators (drywall, paint, flooring, tile, roofing, fence, and more) include a PDF export so you can save or print a materials list for the job.
Do you store the numbers I enter?
No. The calculators run locally in your browser — your measurements never leave your device or get sent to a server.
Stop guessing. Start estimating.
12 free construction calculators, ready when you are. No account, no catch.
Browse all calculators