Contractor-grade guides & cost breakdowns
First-hand estimating data from thousands of MaterialCalc projects, paired with manufacturer specs and building-code references. New articles every Tuesday & Friday.
Start with the metal roofing calculator waste factor guide — it explains why panel roofs need a different waste allowance than shingles, with a worked 1,800 sq ft example.
Skip the reading and jump to a calculator or browse the materials guide.
Which calculators do readers use most?
Concrete, gravel, mulch, paint and drywall account for most sessions on the site. Every article links straight to the calculator it discusses, so you can run your own numbers while you read.
Where can I look up material weights and coverage?
The material guides list weight per cubic yard, density range, coverage depth and common types for each product. Use them to spec the right material before you calculate the quantity.