Free Sourdough Baking Tools
Baker's percentages, true hydration, and starter feeding ratios -- everything you need to nail your next bake.
3 free calculators -- no sign-up required
Frequently Asked Questions
What sourdough calculators are available?
We offer three free calculators: a Baker's Percentage Calculator that converts percentages to gram weights and can work in reverse from a target dough weight; a Hydration Calculator that computes your true dough hydration accounting for the flour and water inside your starter; and a Starter Feeding Calculator that tells you exactly how much old starter to keep, flour and water to add, and discard to remove for any feeding ratio.
Are these sourdough calculators free?
Yes, all three calculators are completely free with no sign-up, no account, and no usage limits. Results update instantly as you type.
How accurate are the calculations?
The calculators use standard baker's math formulas used by professional bakeries worldwide. Baker's percentages, hydration calculations, and feeding ratios are all computed using the same arithmetic taught in professional baking programs.
Can I use these tools on my phone?
Absolutely. Every calculator is fully responsive and works on phones, tablets, and desktops. The inputs are sized for easy touch interaction so you can use them right in your kitchen.