About TheSiteMath
Professional-grade construction calculators, built by industry experts, completely free for contractors and homeowners.
Our Mission
We believe every contractor and homeowner deserves access to accurate, professional-grade construction calculators without paying a dime. TheSiteMath was created to democratize construction estimation tools that were once only available through expensive software.
The Problem We Solve
Too many contractors and DIYers waste money by over-ordering materials or make costly trips back to the store because they under-estimated. Existing calculators are often inaccurate, cluttered with ads, or hidden behind paywalls.
Our Solution
TheSiteMath provides free, accurate calculators based on industry-standard formulas. Our tools are designed for real job sites - mobile-friendly, fast, and precise. No signup required, no hidden fees, just instant accurate estimates.
Our Editorial Process
Every calculator goes through a rigorous development and review process to ensure accuracy.
Industry Research
Every calculator is built on formulas from industry organizations like NRCA, ACI, and NCMA.
Technical Validation
We use precision mathematics (Decimal.js) and test calculations against real-world scenarios.
Contractor Feedback
Our tools are refined based on feedback from professional contractors who use them daily.
All calculator formulas are based on industry standards from NRCA, ACI, NCMA, and AWC. We continuously improve our tools based on user feedback and industry updates.
Built With Expertise
Our calculators combine construction industry knowledge with modern software engineering.
Construction Expertise
Industry Knowledge
Our calculators are built on formulas and standards used by professional contractors across the United States.
Software Engineering
Technical Excellence
We use precision mathematics (Decimal.js) and modern web technologies to ensure accurate, fast calculations every time.
User Experience
Mobile-First Design
Designed for real job sites - large buttons, high contrast, and touch-friendly interfaces that work with work gloves.
Industry Standards We Follow
Our calculations are based on recognized industry standards and best practices.
National Roofing Contractors Association
Roofing material calculations follow NRCA guidelines
American Concrete Institute
Concrete volume formulas based on ACI standards
National Concrete Masonry Association
Block and masonry calculations per NCMA specifications
American Wood Council
Rafter and framing calculations follow AWC span tables
Disclaimer: While our calculators follow industry standards, always verify critical measurements with a licensed contractor for your specific project. Local building codes and material specifications may vary.
How We're Different
100% Free, No Tricks
Unlike competitors who hide features behind paywalls or require email signup, all our calculators are completely free. No freemium model, no premium upgrades needed for basic functionality.
Precision Mathematics
We use Decimal.js for high-precision calculations, avoiding the floating-point errors that plague many online calculators. When materials cost money, accuracy matters.
Built for Job Sites
Large buttons, high contrast text, and touch-friendly interfaces. Our calculators work even when you're wearing work gloves, standing in the sun, or dealing with dust and dirt on your screen.
Privacy Focused
Your calculations happen in your browser. We don't store your project details or require you to create an account. Your data stays on your device.
Educational Content
Every calculator includes comprehensive guides explaining the math, common mistakes, and professional tips. We don't just give you numbers - we help you understand them.
Our Calculators
Professional tools for every phase of your construction project.
Roofing Calculator
Shingles, squares, and underlayment estimates
Concrete Calculator
Cubic yards and bags for slabs and footings
Masonry Calculator
Bricks, mortar, and block estimates
Concrete Block Calculator
CMU blocks, grout, and rebar for walls
Fencing Calculator
Posts, rails, and pickets for fence projects
Rafter Calculator
Rafter lengths and cut angles for roof framing
Drywall Calculator
Sheets, mud, tape, and screws for drywall
Dirt & Fill Calculator
Topsoil, fill dirt, and landscaping materials
Gravel Calculator
Gravel, crushed stone, and drainage materials
Mulch Calculator
Mulch coverage for beds and landscaping
Topsoil Calculator
Topsoil volume for lawns and gardens
Questions or Feedback?
We're always looking to improve our calculators. Have a suggestion for a new feature or found an issue? We'd love to hear from you.
Contact Us