About TheSiteMath

Free construction calculators and planning guides for U.S. contractors and homeowners.

Why we built it

We built TheSiteMath to answer one question: how much material do I need before I buy? Too many people over-order or come up short. Too many tools bury the answer under ads. We wanted a faster, clearer answer.

The problem

Construction math gets expensive fast. A small mistake can mean an extra delivery, wasted material, or a bad bid.

Many online tools stop at raw numbers. They do not tell you what to check next.

Our approach

We put the calculator first. Then we add short guidance that helps users measure better, compare options, and verify the order.

The goal is simple: plan with more confidence before money leaves the job.

Who runs the site

We show who publishes the site, what it covers, and how to report a problem.

Who publishes TheSiteMath

Publisher
TheSiteMath
Editorial team
TheSiteMath Editorial Team
Primary market
United States contractors and homeowners

How updates and corrections work

  • We update pages when formulas, assumptions, or planning guidance change.
  • Use the contact page to report a problem.
  • We publish planning help, not stamped engineering or permit approval.
  • Check final buying and build decisions against local code, suppliers, and qualified pros.

Read our standards

Our editorial standards page explains how we review calculators, update content, and disclose monetization.

Read editorial standards
11+
Free calculators
100%
Free to use
0
Hidden fees
24/7
Available online

How we review pages

We keep the workflow simple: research the rule, check the math, then check the page.

Research first

We start with trade guidance, standard formulas, and real estimating workflows.

Check the math

We use Decimal.js where precision matters and test results against worked examples.

Review the page

We check that the calculator, guide, and supporting copy tell the same story.

We use standards from groups like NRCA, ACI, NCMA, and AWC where they fit the category.

What the site is built on

Good estimating needs field logic, solid software, and clear UX.

Construction logic

Estimating focus

We build around common U.S. material rules, job-site assumptions, and estimator workflows.

Software checks

Precision tools

We use strict calculations, repeatable logic, and fast interfaces that hold up on mobile.

Field-friendly UX

Built for use

The site is designed for quick checks, clear forms, and readable results on job sites.

Standards we follow

We use trade references when they help the estimate.

NRCA

National Roofing Contractors Association

Roofing math and estimating references

ACI

American Concrete Institute

Concrete volume and planning references

NCMA

National Concrete Masonry Association

CMU and masonry estimating references

AWC

American Wood Council

Rafter and framing span references

Important: Our calculators help with planning. Always verify critical dimensions, loads, and code requirements for the job in front of you.

What makes TheSiteMath different

Free to use

Core calculators stay free. You should be able to estimate the job before you pay for software.

Precision where it matters

Material math is money math. We use precise calculations so results do not drift on larger jobs.

Built for quick checks

The interface favors readable forms, large tap targets, and clean result summaries.

Clear about data

Most calculator work stays in your browser. If you send a form, we store only the details you choose to submit.

Numbers plus context

We pair calculators with guides and comparisons so users can check the decision, not just the formula.

Popular calculators

Tools for roofing, concrete, framing, masonry, fencing, and site prep.

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?

Tell us what is missing, unclear, or wrong. That is how the site gets better.

Contact us