Found something wrong? Want to help review a page? Just have a question? Here’s how to reach us.
Corrections and errors
This is the one we most want to hear about. If something on this site is wrong, outdated, missing an important caveat, or doesn’t match what your course, lab, or workplace actually requires, tell us. Include the page URL and what you think should change, and we’ll take a look.
Interested in reviewing a page?
Pages on this site are meant to carry a named, credentialed reviewer before they’re treated as finished. We’re actively looking for chemistry and physics educators, QA or metrology professionals, and people with a software engineering background to review pages in their area. If that’s you, and you’d be willing to look over a page or two, we’d genuinely like to hear from you.
General questions
Questions about a specific calculation, a page’s sourcing, or how something on the site works are welcome. We can’t offer personalized homework help (see below), but questions about the site itself are exactly what this is for.
Homework and assignment help
This site is built to explain the rule behind an answer, not to solve a specific assignment for you — that’s the whole premise behind [how this project works]. If you’re stuck on a particular problem, the calculators and worked examples throughout the site are the best place to start. We’re not able to work through individual homework or lab assignments by email.
Advertising and partnerships
For advertising, licensing, or partnership inquiries, say so directly in your message so it reaches the right place.
How to reach us
Response time
We read every message. As a small, still-growing project, we can’t promise a fast turnaround on everything — but corrections get prioritized over general questions, since that’s the one category where a delay actually costs something.