About Yard Material Tools

Yard Material Tools is an independent calculator project for homeowners and DIYers planning yard, landscape, and hardscape material purchases. It publishes free calculators with visible formulas, editable assumptions, source notes, and printable material lists.

What the project does

The project turns measurements such as area, depth, density, coverage rate, package size, and waste allowance into planning estimates. The site is intentionally narrow: it does not provide real-time inventory or local price promises.

How calculator assumptions are selected

Defaults are selected from public references such as supplier coverage and package data, government material guidance, and university extension publications. Each calculator shows its defaults in an Assumptions section and exposes the inputs that materially affect the result. A supplier label or local specification should replace a generic default whenever one is available.

How formulas are tested

Core volume, weight, coverage, package-rounding, and unit-conversion logic is covered by automated tests. Static builds are also checked so formulas, assumptions, FAQs, and schema remain available in rendered HTML. Tests verify the implemented math; they cannot inspect a yard, confirm drainage or structure, or validate a supplier's current product data.

Sources and update policy

Source notes appear with the relevant calculator or reference table. Density, moisture, compaction, product coverage, and package specifications vary, so published ranges are kept separate from editable supplier values. A page receives a Last updated date only when its formula, assumptions, sources, or explanatory copy actually changes. Source verification is recorded separately from content revision when it is performed.

What this project is not

Yard Material Tools is an independent calculator project. It is not a contractor, engineering firm, landscape architecture practice, or substitute for local supplier specifications and professional advice. Its outputs are planning estimates only. Consult a qualified local professional for structural, drainage, code, utility, or safety questions.

Corrections and contact

Corrections and assumption notes are welcome through the contact page. Include the calculator URL, the inputs used, the expected result, and a source or supplier label when available.