Sourdough Starter Feeding Ratio Calculators
Figure out exactly how much starter, flour, and water to use — whether you already know your ratio, or you just want your starter ready by a certain time.
1
Choose Your Own Ratio
Enter how much starter you need and pick your own feeding ratio — perfect once you know which ratio works for your kitchen and your recipe.
Results
Your starter, flour, and water amounts will appear here.
2
Not Sure Which Ratio to Use?
Just tell the calculator when you want your starter ready to bake with, and it'll pick the right feeding ratio and amounts for you.
Results
Your starter, flour, and water amounts will appear here.
Note: this calculator makes assumptions based on averages for a 75°F/24°C home. You may need to adjust up or down based on your lived experience or if your home is warmer or cooler than mine. The strength of your starter will also greatly impact these averages.
1:1:14–6 hrs
1:2:26–8 hrs
1:3:38–10 hrs
1:4:410–12 hrs
1:5:512–14 hrs
1:10:1016–24 hrs
I also have a full guide on creating and maintaining a sourdough starter, if you need it. Find it here →