About This Sourdough Starter Calculator

Please review this page before it goes live. It is site copy, not a legal document.

This website, Sourdough Starter Calculator, is a free tool for two narrow jobs: turning a starter feeding ratio into flour and water amounts, and calculating a dough’s true hydration by counting the flour and water already in the starter. It is published at sourdoughstartercalculator.com by Auburnbusiness.com.

The calculator was built because those two numbers are easy to get slightly wrong, and slightly wrong hydration is a common reason two bakers can follow the “same” formula and mix different doughs. The site is meant to do the arithmetic clearly, show the worked math, and then get out of the way.

It is not a baking school, not a recipe blog, and not a substitute for your own judgment. The tool does not tell you when a starter is ready, how long a dough should ferment, or how a particular flour will behave in your kitchen. Those questions still belong at the bench.

The site is owned by Auburnbusiness.com, not leased to another operator. It is hosted on a Hostinger plan, with the domain registered at Cloudflare. The calculator runs in your browser; it does not require an account and does not store your formula.

If you have a question or a correction, use the form on the contact page or email jkeith@auburnbusiness.com. Please do not send urgent baking emergencies there — it is an ordinary inbox, and replies may take time.

Auburnbusiness.com
6100 Kitt Lane NW, Apt 1013
Huntsville, AL 35806
United States