A curated list of free construction, landscaping, and home improvement calculators — tools that help you figure out exactly how much material you need before you buy.
Maintained by HowMuchStuff — free materials and quantity calculators for construction and home improvement projects.
- Multi-Calculator Sites
- Concrete & Masonry
- Landscaping & Outdoor
- Painting & Walls
- Flooring & Tile
- Roofing
- Fencing & Decking
- Insulation & Energy
- General Construction Tools
- Cost Estimating
- Mobile Apps
- Reference Guides
- Communities
- Contributing
Complete calculator suites covering multiple project types.
- HowMuchStuff - 82 free calculators across 11 categories including concrete, landscaping, painting, flooring, roofing, and more. Instant results with local pricing.
- Calculator.net - General-purpose calculators with a construction section.
- Omni Calculator - Science-based calculators including construction and engineering tools.
- Inch Calculator - Construction and home improvement calculators with detailed methodology.
Calculate volumes, bag counts, and costs for concrete and masonry projects.
- HowMuchStuff Concrete Calculator - Calculate cubic yards, bags, weight, and cost for slabs, footings, and columns. Supports multiple shape inputs.
- HowMuchStuff Brick Calculator - Determine brick quantities for walls, patios, and columns with mortar estimates.
- Quikrete Calculator - Official Quikrete product calculator for their concrete mix products.
- Sakrete Calculator - Concrete, mortar, and stucco calculators from Sakrete.
Tools for mulch, gravel, topsoil, and outdoor project materials.
- HowMuchStuff Mulch Calculator - Calculate mulch volume in cubic yards with depth recommendations by mulch type.
- HowMuchStuff Gravel Calculator - Gravel volume and weight calculator with support for different gravel types and shapes.
- HowMuchStuff Topsoil Calculator - Topsoil volume, weight, bag counts, and cost estimates for lawns, gardens, and raised beds.
- Soil Calculator - Gardener's Supply Company soil volume calculator.
Estimate paint quantities and drywall materials.
- HowMuchStuff Paint Calculator - Calculate gallons needed based on room dimensions, coats, and paint type. Accounts for doors and windows.
- HowMuchStuff Drywall Calculator - Sheet count, joint compound, tape, and screw estimates for drywall projects.
- Benjamin Moore Paint Calculator - Paint quantity calculator from Benjamin Moore.
- Sherwin-Williams Calculator - Estimate paint needs with Sherwin-Williams products.
Material calculators for tile, hardwood, and flooring projects.
- HowMuchStuff Tile Calculator - Calculate tile quantities with waste factor, accounting for cuts and breakage.
- Floor & Decor Calculator - Tile and flooring calculators from Floor & Decor.
- Home Depot Flooring Calculator - Flooring estimation tools from Home Depot.
Estimate roofing materials including shingles, underlayment, and accessories.
- HowMuchStuff Roofing Calculator - Calculate roofing squares, shingle bundles, underlayment, drip edge, and costs. Supports multiple roof pitches and material types.
- GAF Shingle Calculator - Official GAF roofing materials calculator.
- Owens Corning Roofing Calculator - Estimate roofing materials with Owens Corning products.
Plan materials for fences, decks, and outdoor structures.
- HowMuchStuff Fence Calculator - Posts, pickets, rails, and concrete bag estimates for privacy, picket, chain-link, and vinyl fences.
- Lowe's Fence Calculator - Fencing materials estimator from Lowe's.
- Trex Deck Cost Calculator - Composite decking cost estimator from Trex.
Calculate insulation requirements and energy savings.
- HowMuchStuff Insulation Calculator - Batt, blown-in, and rigid foam insulation quantities with R-value guidance and cost estimates.
- Energy Star Insulation Guide - DOE-recommended insulation levels by climate zone.
- Owens Corning Insulation Calculator - Insulation estimator with product recommendations.
Stair calculators, unit converters, and other construction planning tools.
- HowMuchStuff Stair Calculator - Calculate rise, run, stringer dimensions, and angle with IRC code compliance checking.
- Construction Master Calculator - Industry-standard construction math apps.
Tools for overall project cost estimation and budgeting.
- HomeAdvisor Cost Guides - National average costs for home improvement projects.
- Fixr Cost Guides - Detailed cost breakdowns for renovation and construction projects.
- RSMeans Online - Professional construction cost data (paid).
Construction calculators for on-site use.
- Construction Master Pro - iOS/Android professional construction calculator.
- Measure & Sketch - Floor plan and measurement app.
- Canvas Plans - Blueprint and measurement tool.
Standards, codes, and reference material for construction projects.
- IRC (International Residential Code) - Building code standards for residential construction.
- OSHA Construction Standards - Safety standards for construction work.
- JLC Online - Journal of Light Construction technical articles.
Forums and communities for construction and home improvement.
- r/HomeImprovement - Reddit community for home improvement projects.
- r/DIY - Reddit community for do-it-yourself projects.
- r/Construction - Reddit community for construction professionals.
- GardenWeb / Houzz Forums - Home design and improvement forums.
- Contractor Talk - Professional contractor community.
Contributions welcome! Read the contribution guidelines first.
- HowMuchStuff - 82 free construction calculators
- About HowMuchStuff - Our approach and data sources
- All Links - HowMuchStuff link hub
- Material Estimation Guide - How to estimate construction materials
- 5 Material Calculation Mistakes That Cost Homeowners Thousands - Common estimation errors and how to avoid them
- The Math Behind Construction Calculators - How material estimation formulas actually work
- Why Most DIYers Buy 30% Too Much Material - The real cost of guessing instead of calculating
