Terms of Use
The conditions under which this site and its tools are made available.
Last updated: 2026-09-23
Acceptance
By using this site you accept these terms. If you do not accept them, please do not use the site.
What the tools are
The calculators and converters are provided for information and general guidance. They are not professional advice — not engineering advice, not financial advice, not medical, legal or tax advice.
Formulas are checked before publication and tested automatically, but no calculator can know the context of your particular case. For any decision with safety, legal or financial consequences, have the result verified by a qualified professional.
No warranty
The site is provided "as is", without warranty of any kind. We do not guarantee that it will be available without interruption or that every result will be free of error.
Limitation of liability
To the extent permitted by law, we are not liable for any loss or damage arising from the use of, or reliance on, results obtained from this site. Nothing in these terms limits liability that cannot be limited by law.
Acceptable use
You may use the tools freely, including for professional work. You may not attempt to disrupt the service, extract the content in bulk for republication, or present the tools as your own.
Intellectual property
The design, the text and the tool implementations belong to Rita Raquel Carvalho Rodrigues de Oliveira. Mathematical formulas and physical constants are, of course, nobody's property.
External links
Where the site links to other websites, we are not responsible for their content or their practices.
Governing law
These terms are governed by the law of Portugal, without prejudice to any mandatory consumer protection rules of your country of residence.
Changes
These terms may be updated. The version published on this page is the one that applies.