Sourdough Calculator
Sourdough Calculator
Baker’s percentages, hydration and a starter-feeding calculator. Works offline, in English and German. The calculators are free.
Google Play — coming soon Open the free calculator
Free dough calculator
Hydration is the total: all water, including water already in the starter, divided by all flour, including flour already in the starter. Starter and salt percentages are of the recipe flour. Units are grams. A shareable page lives at /calc/. US$0 / KSh 0.
Prices
The calculators
US$0
KSh 0
Dough and feeding calculators. Always free, and they work without the Internet.
Unlock log and reminders
About US$4.99
About KSh 648
A one-time purchase (product ID pro_lifetime) for the starter log and a daily feeding reminder, on this Google Play account.
Kenya shilling figures use KSh 129.91 = US$1 (Central Bank of Kenya, 6 November 2026) and are illustrative. Google Play will set the charged local price.
Sauerteig-Rechner
Wenn Deutsch die Sprache Ihres Geräts ist, erscheint die Oberfläche auf Deutsch. Die Rechner sind frei (US$0 / KSh 0). Das optionale Tagebuch und die Fütterungserinnerung kosten etwa US$4,99 (etwa KSh 648).
Questions
Are the calculators free?
Yes. The dough calculator and the feeding calculator are free (US$0 / KSh 0). A one-time purchase of about US$4.99 (about KSh 648) unlocks a starter log and a daily feeding reminder.
How is hydration counted?
Hydration is the total: all water, including water already in the starter, divided by all flour, including flour already in the starter. Starter and salt percentages are of the recipe flour you weigh out.
Is there a German edition?
Yes. The interface follows the language of the device and is offered in English and German.