Terms and Conditions
Use the results freely. The site is provided as is, and it is not a substitute for professional advice on anything that matters.
The results
Arithmetic is not ownable. Copy any figure from this site and use it anywhere.
The written content
The explanations, methods and charts are ours. Quote them with a link; do not republish
pages wholesale.
No warranty, and what this site is not
Everything here is provided as is. These are general-purpose calculators, not professional
tools. Nothing on this site is medical, financial, tax, legal or engineering advice, and no
figure here should be relied on for a decision in any of those areas without checking it with
someone qualified. Where a page’s calculation excludes something material, it says so on the
page.
Changes
These terms may be updated. Continued use after a change means the updated terms apply.