Terms of Use

Last updated: July 10, 2026

By using Sparkfield, you agree to the terms below. They're short on purpose — this is a free, no-signup site, not a service you're contracting for.

Informational only, not professional advice

Every calculator on this site gives a general, informational estimate. It is not medical, veterinary, or other professional advice, and it doesn't replace the judgment of a qualified professional. Where a page includes a specific disclaimer or a hotline number, that guidance stands above anything in these terms.

No warranty

This site is provided "as is." We cite our sources and do our best to keep the underlying figures accurate, but we don't guarantee that any result is complete, current, or error-free, and we're not liable for decisions made based on it.

What you may do

Visit the site and use the calculators for your own purposes, personal or professional. That's what they're here for.

What you may not do

Copy, re-host, embed, or redistribute this site's pages or code without our permission — the tools are free to use, which is a different promise than free to take. This includes scraping the site at scale or reproducing a calculator's design or logic on another site. (A narrow embed license may be offered separately, in writing, for a specific partner — the default above applies to everyone else.) Don't attempt to disrupt, overload, or interfere with the site's normal operation.

Changes to these terms

We may update these terms as the site grows. Material changes will move the "last updated" date above.

Contact

A dedicated contact address for this site isn't live yet. Check back here once one is — this page will link it the same day.