ProjectQty is a free, browser-based suite of 41 construction material calculators that converts measurements into order-ready quantities for concrete, gravel, roofing, flooring, landscaping, and more, with inspectable formulas and assumptions.
What is ProjectQty?
ProjectQty is a free web platform that provides 41 construction material calculators. You enter imperial or metric dimensions and editable planning assumptions, and it outputs order-ready quantities such as cubic yards, whole bags, squares, bundles, rolls, sheets, tiles, or tons. The tool runs entirely in your browser, requires no account, and does not send project dimensions to analytics. It is available at projectqty.com and is built for DIY planners and lightweight construction teams who want defensible quantity estimates.
Key Features
- 41 free calculators — Covering concrete, gravel, asphalt, stone, topsoil, paver, slab cost, volume, cubic feet, stair, roof pitch, excavation, brick, block, mortar, cement, sand, rebar, footing, post hole, tile, flooring, carpet, drywall, paint, wallpaper, insulation, baseboard, grout, ceiling tile, fence, decking, siding, roofing material, gutter, board foot, wall stud, mulch, sod, grass seed, and compost. Browse all calculators
- Imperial and metric input — Switch between feet/inches and meters on any calculator; results adjust automatically.
- Order-unit rounding — Quantities are rounded only at the final ordering unit (e.g., a whole bag or square), with waste applied before rounding, so the estimate reflects what you'll actually purchase.
- Transparent math — Each calculator shows its formula, a worked example, assumptions, and source references. See how we calculate
- Editable assumptions — Waste percentage, material density, coverage per package, and local price are user-editable; defaults are visible but not locked.
- Browser-local project guides — Five workflows (roof replacement, room renovation, patio build, masonry wall, landscape bed) keep multiple calculator results in one named project stored entirely in your browser.
- No-account privacy — No sign-up, no email, and no project dimensions sent to analytics; calculations stay on your device.
- Print-ready results — Output is formatted for printing or sharing with suppliers.
Who is it for?
- DIY homeowners planning a concrete slab, paver patio, or interior renovation can use the calculators to determine exactly how much material to order without overbuying.
- Lightweight construction teams and contractors can quickly generate takeoffs for concrete, gravel, roofing, and other materials, then adjust assumptions like waste or density to match each job.
- Landscapers can estimate mulch, sod, grass seed, and compost volumes for residential or commercial beds.
- Renovation planners can follow the guided project workflows (e.g., 4-step roof replacement, 5-step room renovation) to carry quantities forward across multiple calculators.
What can you do with ProjectQty?
- Concrete slab estimate: Enter slab length, width, depth, and waste to get base volume and order-ready cubic yards, plus whole bags scoped to QUIKRETE Concrete Mix No. 1101 yields. Open concrete calculator
- Roof replacement planning: Use the roofing material calculator to convert a simple footprint and pitch into sloped roof area, roofing squares, shingle bundles, underlayment rolls, and fasteners.
- Driveway gravel takeoff: Input dimensions and compacted depth to receive cubic yards and estimated tons, with an editable bulk density for local aggregate.
- Room renovation estimate: Run the 5-step guide to calculate paint, flooring, drywall, baseboard, and tile in one browser-local project.
How does ProjectQty work?
- Measure the space — Add rectangular or circular areas to your estimate.
- Set assumptions — Choose waste percentage, package size, density, or a local price.
- Verify the order — Review base quantity, adjustment, order-unit rounding, formula, and sources before buying.
All calculations happen instantly in the browser, and changing any input updates the order quantity live.
Pricing
All 41 calculators are free to use. No account, sign-up, or payment is required.
FAQ
Does ProjectQty require an account?
No. All calculators are accessible without signing up, and your calculations remain in your browser. The site states that no account, address, contact details, or project dimensions are sent to analytics.
Can I use metric measurements?
Yes. Every calculator accepts imperial or metric units. You can switch between feet/inches and meters as needed, and the formula output adjusts accordingly.
Yes. Each calculator displays its formula, a worked example, assumptions, and source references. You can also review the source register and reproduce validation cases.
How do I carry values from one calculator to another?
Use the browser-local project guides. For example, the roof replacement guide chains four calculator steps, and the room renovation guide chains five steps. Each carried-forward value requires review before it reaches the next calculator.
What kinds of output units do the calculators provide?
Outputs vary by tool: cubic yards or cubic meters for concrete, gravel, mulch, and soil; whole bags for cement, mortar, and post-hole concrete; squares and bundles for roofing; rolls for carpet and wallpaper; sheets for drywall; tiles and cartons for tile; and boards or linear feet for lumber and trim.
