About MaterialCalc

MaterialCalc is a small, independent site publishing fast calculators for common home-project materials: paint, drywall, mulch, concrete, roof pitch, sod, and gravel — with more on the way.

The project started from a simple frustration: most online material calculators are either slow, cluttered with ads stacked over the inputs, or quietly over-estimate by hiding the waste factor. We wanted a version that:

• Puts the inputs and the answer above the fold on a phone.
• Shows the math so you can sanity-check it.
• Exposes the waste factor as an editable number.
• Produces a plain-text shopping list you can paste into a store app.

Who runs the site

MaterialCalc is operated as an independent project focused on DIY home-improvement tools. We're not affiliated with Home Depot, Lowe's, or any specific paint, concrete, or landscaping brand.

How we build coverage numbers

Default coverage values (like "350 sq ft per gallon" for paint, or "1.5 tons per cubic yard" for crushed stone) are drawn from published manufacturer data sheets and industry-standard references. We periodically review them and will post a changelog entry here when defaults change.

Accuracy and use

The calculators are intended as a planning aid, not a substitute for professional estimates on critical structural or code-required work. For permitted projects, confirm quantities with your contractor, engineer, or building inspector. See the Terms of Service for the full disclaimer.

Feedback and corrections

If a result looks wrong or a tool is missing a feature you'd use, please email us. We respond to most messages within a couple of days.