Legal
Terms and Conditions
The terms that apply when you use this site and its calculators.
Acceptance
By using this website you agree to these terms. If you do not accept them, please do not use the site. These terms apply to every page and calculator here.
Permitted Use
You may use this site freely for personal study, professional reference, teaching and general information. You may link to any page, quote short passages with attribution, and use the results of the calculators in your own work.
You may not copy the site's written content or calculator code wholesale and republish it as your own, present the site as yours, attempt to interfere with its operation or security, or use automated systems to make excessive requests that degrade service for others.
No Professional Relationship
This site provides general technical information and calculation tools. It does not provide professional engineering, electrical contracting, safety consulting or legal advice, and using it does not create any professional or advisory relationship between you and the site operator.
Electrical work carries a genuine risk of injury, fire and death. Decisions about installation, conductor sizing, protection and compliance must be made by a qualified person working to the codes and standards that apply where the work is carried out.
Accuracy and Availability
We work carefully to keep formulas, constants and explanations correct, and every calculator page states the assumptions its model relies on. Even so, we cannot guarantee that the content is complete, current or free from error, and results should be verified independently before being relied on for anything consequential.
The site is provided on an as-is and as-available basis. We do not guarantee uninterrupted access, and we may change, suspend or remove any part of it at any time without notice.
Limitation of Liability
To the fullest extent permitted by applicable law, the site operator is not liable for any loss or damage arising from your use of this site or reliance on its content. That includes, without limitation, direct, indirect, incidental, consequential or special damages, loss of profits, damage to equipment, and any injury or loss arising from electrical work.
Some jurisdictions do not permit certain limitations of liability, so parts of this section may not apply to you. Nothing in these terms excludes liability that cannot lawfully be excluded.
Intellectual Property
The written content, page designs, icons, illustrations and calculator implementations on this site are the property of the site operator and are protected by copyright. The underlying physical laws and mathematical formulas are, of course, not owned by anyone; our expression and implementation of them is.
Trademarks and product names mentioned in explanatory content belong to their respective owners and are used only for identification.
External Links
Any links to other websites are provided for convenience. We do not control those sites and are not responsible for their content, accuracy or practices. Including a link is not an endorsement.
Changes to These Terms
These terms may be updated from time to time. The current version is always the one published on this page, with its date shown above. Continuing to use the site after an update means you accept the revised terms.
Governing Law
If you are operating this site, insert the jurisdiction whose law governs these terms and in whose courts disputes will be resolved. That choice depends on where the site is operated from and should be confirmed with a legal adviser familiar with your location.
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Solve for voltage, current, resistance or power from any two known values.