Free Construction & DIY Calculators
Concrete, mulch, gravel, paint, tile, drywall, roofing, lumber. Get cubic yards, bags, gallons, and squares in seconds — same math the trades use.
Instant results
Live calculation, no submit button
Industry-standard formulas
Same math used by contractors
Mobile-first
Works on any phone or tablet
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26 free calculators for concrete, landscaping, paint, interior, lumber, and roofing.
- Concrete & Masonry
Concrete Calculator
Use this concrete calculator to find out exactly how much concrete you need for a slab, footing, patio, or driveway.
Open calculator - Concrete & Masonry
Concrete Slab Calculator
A concrete slab calculator that handles patios, garage floors, basements, and shed pads.
Open calculator - Landscaping
Mulch Calculator
Use this mulch calculator to plan a flower bed, tree ring, or full landscape refresh.
Open calculator - Landscaping
Gravel Calculator
Use this gravel calculator for driveways, French drains, paver bases, or pea-gravel paths.
Open calculator - Paint & Finishes
Paint Calculator
Use this paint calculator to size up an interior repaint, exterior siding job, or accent wall.
Open calculator - Roofing
Roof Pitch Calculator
Convert any roof pitch from rise/run to angle, percent slope, or square footage.
Open calculator - Interior
Tile Calculator
Plan a floor, shower, or kitchen backsplash.
Open calculator - Interior
Drywall Calculator
Use this drywall calculator to figure out exactly how many sheets, screws, and joint compound (mud) you need for a room remodel or new-build.
Open calculator - Landscaping
Topsoil Calculator
Estimate topsoil volume for a lawn, raised bed, or grading project.
Open calculator - Lumber & Framing
Board Feet Calculator
A board foot is the standard volumetric unit for hardwood lumber: 1 in × 12 in × 12 in.
Open calculator - Concrete & Masonry
Concrete Footing Calculator
Use this concrete footing calculator to figure out the cubic yards and bag count you need for a continuous foundation footing, deck post pier, or retaining wall base.
Open calculator - Concrete & Masonry
Concrete Cubic Yards Calculator
Use this calculator to convert any rectangular concrete pour to cubic yards — the unit ready-mix trucks deliver in.
Open calculator - Concrete & Masonry
Concrete Pad Calculator
Use this concrete pad calculator to size a small slab for an AC condenser, generator, shed, hot tub, or trash can.
Open calculator - Concrete & Masonry
Concrete Floor Calculator
Use this concrete floor calculator for interior slabs — garages, basements, workshops, and storage buildings.
Open calculator - Landscaping
Mulch Coverage Calculator
Figure out how much area a yard or bag of mulch will actually cover at the depth you want.
Open calculator - Landscaping
Gravel Driveway Calculator
Use this gravel driveway calculator to plan a new gravel driveway or refresh an existing one.
Open calculator - Interior
Sheetrock Calculator
Use this sheetrock calculator to estimate the number of 4×8 panels, screws, and joint compound (mud) for any room or wall.
Open calculator - Paint & Finishes
Room Paint Calculator
Plan an interior repaint by the room.
Open calculator - Landscaping
Rubber Mulch Calculator
Calculate how much rubber mulch you need for a playground, garden bed, or pet run.
Open calculator - Landscaping
Pea Gravel Calculator
Use this pea gravel calculator for footpaths, French drains, drainage beds, or pea-gravel patios.
Open calculator - Landscaping
Sand Calculator
Use this sand calculator to estimate how much sand you need for paver bases, sandboxes, concrete mixing, or sandbox installation.
Open calculator - Landscaping
Paver Sand Calculator
Calculate how much bedding sand you need to set pavers.
Open calculator - Paint & Finishes
Exterior Paint Calculator
Plan an exterior repaint by figuring the gallons of paint and primer for your siding.
Open calculator - Interior
Backsplash Tile Calculator
Figure out exactly how much backsplash tile you need for a kitchen or bathroom.
Open calculator - Interior
Tile Flooring Calculator
Calculate the tile flooring you need for a bathroom, kitchen, mudroom, or whole-house floor.
Open calculator - Roofing
Roof Shingles Calculator
Use this roof shingles calculator to figure out how many bundles you need to roof a house, garage, or shed.
Open calculator
Browse
By category
Concrete & Masonry
Slabs, footings, columns, and pads.
6 calculators
Browse Concrete & MasonryLandscaping
Mulch, gravel, topsoil, and stone.
9 calculators
Browse LandscapingPaint & Finishes
Interior, exterior, and primer coverage.
3 calculators
Browse Paint & FinishesInterior
Tile, drywall, and flooring.
5 calculators
Browse InteriorLumber & Framing
Board feet, framing, and 2×4 counts.
1 calculator
Browse Lumber & FramingRoofing
Pitch, slope, area, and shingle counts.
2 calculators
Browse Roofing
Quick Answers
Popular questions
Direct answers to the questions homeowners and contractors search most.
Concrete & Masonry
How Much Is a Yard of Concrete?
Landscaping
How Many Cubic Feet Are in a Yard of Mulch?
Roofing
How Many Bundles Are in a Square of Shingles?
Landscaping
How Many Bags of Mulch Are in a Yard?
Paint & Finishes
How Much Paint Do I Need?
Paint & Finishes
How Many Square Feet Does a Gallon of Paint Cover?
FAQ
Frequently asked questions
Yes — every calculator uses standard industry formulas (e.g. cubic feet ÷ 27 for cubic yards, 350 ft²/gallon for paint coverage). For critical applications, always confirm with a licensed contractor.
Most calculators support both imperial (US) and metric. Toggle the unit selector inside any calculator — your inputs and results update live.
Real-world projects always have spillage, cuts, and damaged material. Most pros add 5–10% for concrete and gravel, 10–15% for tile and drywall, and 20% for unusual or diagonal layouts.
Yes — all calculators and reference pages are free to use. The site is supported by ads. We don't collect personal information beyond standard analytics (with your consent).
Yes. Every calculator is mobile-first and works in any modern browser. No app to install.
A cubic yard equals 27 cubic feet (because 3 ft × 3 ft × 3 ft = 27 ft³). Bulk materials like concrete, mulch, gravel, and topsoil are sold by the cubic yard; small bags are usually 1–3 cubic feet.
About
About BuildMaterialCalc
BuildMaterialCalc is a free resource for DIY homeowners, contractors, and the trades. Every calculator runs in your browser — your inputs never leave your device, and we never ask for an email or signup.
All formulas come from standard industry references: ACI for concrete, APA for engineered lumber, NRCA for roofing, and the relevant ASTM standards for material weights and yields. Calculations are estimates only. Always consult a licensed professional for structural, code, or safety-critical applications.