About Calcuzilo

What this site does

Calcuzilo is a free collection of calculators for home projects, making and everyday energy math, organised into six areas: Landscape & Groundwork, Floors & Walls, Wood & Trim, Water & Containers, Crafts & Making, and Energy & Workshop Math. Each tool shows its formula, assumptions, worked example and limitations on the same page as the result.

How the tools are built

Every calculator is a small, documented model. Inputs are explicit, unit conversion is exact, and changing any measurement recalculates immediately. Named reference values make common estimates easier to try. Check their source and product basis, then replace them with your supplier’s information where it differs.

How they are checked

Automated fixtures, precision tests, cross-tool invariants and browser interaction checks run before each release, and every release is versioned. The methodology describes the arithmetic, rounding and purchasing rules in detail. Automated checks are separate from AI-assisted editorial and arithmetic review. The editorial policy identifies the limits of these reviews and the decisions that require qualified professional advice.

Scope and limits

These are planning estimates for quantities and arithmetic relationships. They do not provide structural design, electrical sizing for code compliance, chemical dosing beyond the stated model, or installation and safety advice. Confirm quantities and coverage with your supplier, and obtain professional advice where your project requires it.

Independence and privacy

No account is required, there is no advertising or affiliate placement, and calculations run in your browser. A report you deliberately submit is stored privately for the site owner to review. Device preferences, short-lived abuse prevention and ordinary hosting logs are explained in the privacy notice.