About CrumbDesk
CrumbDesk is a free collection of sourdough calculators and reference guides built for home bakers. The goal is simple: take the math and guesswork out of sourdough so you can focus on the baking.
Sourdough is one of the most rewarding things you can make at home. It's also one of the most variable. Temperature, hydration, fermentation time, starter strength — every variable affects the outcome, and most recipes treat these as fixed numbers when they're anything but. CrumbDesk exists to help you understand those variables and work with them, not around them.
What you'll find here
Every tool on CrumbDesk is free to use, no account required:
- Hydration Calculator — calculate the hydration percentage of any dough formula
- Starter Feeding Calculator — figure out exactly how much flour and water to use when feeding your starter
- Bulk Fermentation Calculator — estimate bulk fermentation time based on your kitchen temperature and starter percentage
- Recipe Scaler — scale any sourdough recipe up or down to any batch size while keeping your ratios intact
Alongside the calculators, the CrumbDesk blog covers the fundamentals — things like baker's percentages, feeding ratios, hydration, and fermentation — written for bakers who want to understand what's actually happening in their dough, not just follow steps blindly.
How CrumbDesk works
All calculations happen directly in your browser. Nothing you enter is sent to a server or stored anywhere. There are no accounts, no email signups, and no data collection beyond the standard cookies used by our advertising partner, Google AdSense. You can read our full privacy policy for details.
Who made this
CrumbDesk was built by a home baker frustrated by doing the same mental math every time a recipe needed adjusting. If you've ever tried to scale a loaf for a smaller Dutch oven, wondered whether your starter was actually ready, or stared at a bulk fermentation time range and had no idea where to start — this site is for you.
If you have feedback or a question, you can reach us at optimalpixelstudio@gmail.com.