Content and copyright
You're welcome to link to any page and to quote short passages with a link back. Please don't copy calculators, code or large parts of the text to another site without permission.
Terms of use
By using this site, you agree to these terms. They're short and written in plain English.
By Zubair Abid. Updated .
Using the calculators
The calculators and articles are free for personal and commercial use. They provide estimates based on the information you enter and on typical values. They are provided 'as is', without any guarantee that results are accurate, complete or suitable for a particular purpose.
You are responsible for how you use the results. Don't rely on them alone for safety-critical decisions such as powering medical equipment, sizing electrical wiring or complying with transport regulations.
Links and advertising
The site shows third-party ads and may link to other websites. We don't control and aren't responsible for their content, products or privacy practices.
Limitation of liability
To the extent allowed by law, we aren't liable for any loss or damage arising from the use of the site or reliance on its results.
Changes
We may update these terms. The current version and its date are always on this page. Questions: contact us.