Contact

A real person reads these. Corrections to the math are especially welcome, because this site's whole promise is that a lye weight you get here is one you can check.

Email us

Pick whichever fits. They all reach the same inbox, but the labels help us triage.

General questions & feedback hello@soapmakingtoolbox.com
Corrections: a number here looks wrong corrections@soapmakingtoolbox.com
Partnerships, affiliates, press partners@soapmakingtoolbox.com
Privacy & data requests privacy@soapmakingtoolbox.com

Replies within 2–3 business days. If you're writing about a recipe, paste the recipe link. Every calculator here puts the whole recipe in the URL, so that one link tells us exactly what you're looking at.

Not an emergency service

If lye has contacted skin or eyes, flush with running water and get medical help now. Don't wait on an email. If someone has reacted badly to soap you made, that's a question for a doctor.

Found a mistake?

Tell us and we'll fix it fast, with a note on the page saying what changed. If a lye weight here disagrees with another calculator, we want to know. Sometimes the difference is an assumption (NaOH purity, KOH at 90%) and sometimes it's a bug, and either way the answer belongs on the page.

Soapmaking questions are welcome

Ask away. We can't diagnose a batch we can't see, though a photo and the recipe link get us most of the way. The questions we're asked most become the next guides on the site, so a good question helps everyone.

What we don't do

No sponsored posts, no paid placement, no guest-post link swaps. We also don't write custom formulations, sign off cosmetic safety assessments, or advise on whether your labels are compliant. Those are jobs for a qualified assessor where you sell.

SoapmakingToolbox is run by Brian Hamilton. Some links earn us a commission at no cost to you. The full disclosure explains exactly how. Affiliate disclosure →