Free Construction & Home Building Calculators
From the first footing to the final coat of paint. Estimate concrete, framing lumber, roofing, tile, gravel, electrical, HVAC and project costs in seconds — with trade waste factors and bag yields already in the math.
Formulas estimators actually use · runs in your browser · order-ready results
Every calculator works like this — quantities, waste and cost in one clean result, with one-click copy to share. Try the Concrete Slab Calculator
Try a shorter keyword — for example “concrete”, “slope” or “cost”.
Browse by category
From the first footing to the final coat of paint, every calculator is grouped by trade so you can jump straight to the numbers you need — concrete and masonry, framing lumber, roofing, flooring and tile, paint and drywall, bulk landscape material like gravel and mulch, decks and fences, electrical loads, HVAC sizing, plumbing, septic systems and project cost estimators that turn quantities into a realistic budget.
Construction & Materials Calculators
The core of every build. Estimate concrete, framing lumber, roofing, flooring and wall finishes from real job-site dimensions — in cubic yards, squares, sheets and board feet.
Concrete & Masonry
All Concrete & Masonry calculatorsOrder the right amount of concrete and masonry every time.
Concrete Calculator
Cubic yards, cubic metres and 60/80 lb bags for any pour.
Concrete Slab Calculator
Concrete, gravel base and rebar for patios and garage floors.
Concrete Footing Calculator
Footing, stem wall and pier pad concrete by width and depth.
Concrete Block Calculator
CMU blocks, mortar bags and grout for block walls.
Brick Calculator
Brick counts and mortar for walls, veneers and piers.
Framing & Lumber
All Framing & Lumber calculatorsBuild a complete lumber takeoff before you walk into the yard.
Roofing
All Roofing calculatorsFrom footprint to finished roof.
Flooring & Tile
All Flooring & Tile calculatorsMeasure once, order right.
Drywall & Paint
All Drywall & Paint calculatorsFinish walls with the right material list.
Exterior & Landscaping Calculators
Everything outside the walls: gravel and mulch by the cubic yard, topsoil and sod by the pallet, pavers by the pattern, plus full deck and fence material lists.
Landscaping & Hardscape
All Landscaping & Hardscape calculatorsOrder bulk material with confidence.
Gravel Calculator
Cubic yards and tons of gravel for paths, beds and drives.
Gravel Driveway Calculator
Yards and tons of gravel per layer for a full driveway.
Mulch Calculator
Cubic yards or bags of mulch for beds at any depth.
Topsoil Calculator
Soil volume in yards, tons or bags for lawns and beds.
Sand Calculator
Sand volume in yards, tons or bags for base and mortar.
Paver Calculator
Paver count by pattern, plus base gravel and bedding sand.
Sod Calculator
Square feet, rolls and pallets of sod for your lawn.
Decks & Fences
All Decks & Fences calculatorsA complete material list for outdoor structures.
Trades & Systems Calculators (MEP)
Electrical, HVAC, plumbing and septic calculators for sizing equipment, checking code limits and getting the pipe and airflow numbers right the first time.
Electrical
All Electrical calculatorsCheck the numbers before you pull wire.
Size equipment that fits the load.
Plumbing & Drainage
All Plumbing & Drainage calculatorsKnow your pipe before the water does.
Septic Systems
All Septic Systems calculatorsDesign, size and maintain a septic system that passes inspection.
Septic Tank Size Calculator
Tank gallons by bedrooms, occupants and daily flow.
Drain Field Calculator
Leach field area, trench length and pipe runs.
Septic Pipe Slope Calculator
Correct fall for septic and sewer lines, drop per foot.
Septic Pumping Cost Calculator
Pumping cost from tank size, service fees and disposal.
Planning & Cost Calculators
Turn a takeoff into a bid. Estimate total construction cost per square foot, labor hours and the waste allowance that keeps your material budget honest.
Cost & Estimating
All Cost & Estimating calculatorsPrice the job, not the guess.
Construction Cost Calculator
Total build cost per square foot by finish level and region.
Labor Cost Calculator
Labor cost from crew size, rate, hours and overhead.
Material Waste Calculator
Add the right waste factor to any material order.
Numbers you can order material from
Every calculator uses the same formulas estimators use on paper — then adds the realistic extras: waste allowance, bag yields, coverage rates, compaction loss and code minimums.
Instant, on-device results
Everything is calculated locally in your browser. No uploads, no waiting, no data leaves your phone or laptop.
Real-world waste factors
Choose 5%, 10% or 15% overage per material and see exactly how much extra to order.
Cost built in
Add your supplier’s price per yard, box, sheet or ton and get a full material budget with the takeoff.
Plain-English formulas
Each tool shows the formula it used, so you can check the math and explain the number to a client.
From measurements to a confident material order
Every calculator follows the same simple workflow — no construction experience needed.
Measure your project
Enter the length, width and height you already have — in feet and inches or metres and centimetres. Working with an odd shape? Break it into rectangles and add the pieces; the calculators handle the rest.
works on any deviceLet the formulas do the work
Industry-standard waste factors, bag yields, coverage rates and compaction loss are applied automatically. You get exact material quantities — cubic yards, tons, sheets, boxes or bags — in seconds.
waste factors built inOrder with confidence
Compare the result with contractor quotes, copy it into an email or a text, and order exactly what the job needs. No guesswork, no last-minute runs for one more bag.
copy & share resultsBuilt for homeowners, DIYers and contractors
Toolsish is for anyone who needs a trustworthy number before spending money on materials or labour. The same calculators that help a homeowner plan a first patio help a contractor price jobs every week — accurate enough to order from, simple enough to run on a phone at the job site.
Homeowners
Get a realistic budget before you call anyone. Price a patio, deck, fence or kitchen remodel in minutes, then walk into every quote knowing what fair pricing looks like.
DIYers
Take the guesswork out of material runs. Concrete bags, gravel tons, paint gallons, tile boxes and drywall sheets — calculated with waste already counted, so the project never stalls for one more trip to the store.
Contractors
Run quick takeoffs from your phone on site. Keep waste allowances consistent across estimates, copy results straight into quotes and explain every number to a client with confidence.
Questions people ask before ordering material
Are these construction calculators free to use?
Do the calculators work in metric and imperial units?
How much extra material should I add for waste?
Can I use these calculators for professional bids?
Which calculator should I start with?
How often are new calculators added?
Not sure which calculator you need?
Start with the square footage calculator to get your area, then pick the material calculator for the trade you are working in.