Terms and Conditions

Last updated: August 10, 2026

Use of the site

You may use the site for personal, educational and legitimate professional reference purposes. You must not attempt to interfere with the site, bypass security controls, overload services, submit malicious code or use automated access in a way that materially disrupts normal operation.

Educational nature of the tools

Calculators and visualisations implement simplified physical models using the values you provide. A result may be unsuitable for a particular real system if the assumptions do not match actual geometry, material properties, boundary conditions, safety requirements or applicable standards.

You are responsible for deciding whether a calculation is appropriate for your purpose. See the Disclaimer for additional limitations relating to engineering, buildings, electronics, health and workplace heat.

Accuracy and corrections

The site aims to use established scientific relationships and reputable sources. Errors can still occur in software, data entry, interpretation or source material. If you identify a suspected error, please report the page URL, calculation and issue through the contact form so it can be reviewed.

Intellectual property

Original site text, interface design, calculator implementation, diagrams and site branding are protected by applicable intellectual-property laws unless otherwise stated. Facts, scientific equations and public-domain information are not claimed as proprietary simply because they appear on the site.

You may quote short portions with appropriate attribution where permitted by law. Republishing substantial original site content, copying the interface wholesale or presenting the site’s original material as your own may require permission.

Third-party sources and links

The site links to external organisations to support factual claims and provide further reading. Those organisations control their own sites, publications, availability and terms. A link does not imply endorsement, partnership or affiliation unless the page explicitly states otherwise.

Availability

Tools and pages may change as methods are corrected, datasets improve or site functionality evolves. The site may be unavailable temporarily for maintenance, security incidents, hosting problems or other operational reasons.

Prohibited reliance

Do not rely on the site as the sole basis for emergency decisions, medical decisions, workplace safety determinations, regulatory compliance, structural or mechanical engineering approval, or safety-critical electronics design.

Changes to these terms

These terms may be updated when the site’s functionality or legal requirements change. The displayed update date reflects a substantive revision.

Contact

Questions about these terms can be sent through the contact page.