About calcnet

calcnet is a network of eight interactive single-purpose calculators built to do one thing well each, and to remain genuinely useful in an era when AI Overviews try to short-circuit the SERP. Every calculator computes against your specific inputs, cites its sources, and acknowledges when a different reference is the right tool.

Who built this

The site is built and maintained by Michael as part of a portfolio of passive-income projects. The focus is depth over breadth: eight tools audited carefully, not eighty tools made shallow.

Reach the operator: [email protected].

How the math is built

Each calculator is a TypeScript module with explicit unit tests (5–10 hand-verified test cases per calculator). The math itself is published in references such as ACI 318, ADA 2010 Standards for Accessible Design, NREL National Solar Radiation Database, USDA hardiness maps, Lincoln Electric and Miller Electric manufacturer datasheets, and additive manufacturer publications. Math is not copyrightable (Baker v. Selden); proprietary table layouts are not reproduced.

Data licensing

Every dataset that backs a calculator is listed on the data licensing page with its source URL, license, date accessed, and attribution string where required by the publisher (NREL and USDA require attribution).

Affiliate disclosure

Most calculators link to a small set of vendor products and services relevant to the calculation. Some of those links pay a small commission if you make a purchase. Affiliate links are marked rel="nofollow sponsored" per Google's link-attribution guidelines. The full disclosure lives on the disclosure page.

What's intentionally not here

• No login / no account. Calculators compute locally in your browser. We never send your inputs to a server.
• No tracking cookies you can see. Cloudflare Web Analytics is the only first-party analytics — it's a single privacy-preserving script and stores no cookies.
• No newsletters by default. One opt-in form exists on the beekeeping calculator (seasonal supering reminders); subscribing is the only data we keep.
• No autogenerated content. Every word on this site was written or edited by humans (the operator + the AI tooling under his direct review).

If you find a math error

Email [email protected] with the calculator, the inputs, your expected output, and the reference you used. The fix usually ships the same week.