Sourdough Starter Feeding Calculator
Summit Sourdough
Summit Sourdough Starter Calculator
Three essential tools in one place — use the tabs below to feed your starter, calculate your needs, or divide your dough with precision.
Feed your starter with confidence, work backward from your recipe needs, and instantly see how much starter, flour, and water to use — while still leaving starter behind in the jar.
Feed My Starter
Enter how much starter you have now, choose your ratio, and see exactly how much flour and water to add.
Your Inputs
g
Feeding Ratio
This shows a simple forward feed. Example: at a 1:2:2 ratio, every 1 part starter gets 2 parts flour and 2 parts water.
Total After Feeding
125 g
Your full starter amount after feeding.
Starter used25 g
Flour to add50 g
Water to add50 g
How Much Starter Do I Need?
Work backward from what your recipe needs and still leave starter in your jar for the next feed.
Starter Requirements
g
g
g
This is how much starter is currently in your jar and available to feed.
Feeding Ratio
The calculator adds your recipe starter and your jar reserve together to show your total target. Then it uses the exact amount of starter you currently have on hand and shows whole-number feed amounts only.
Multiple Recipes
Add several recipes together to see your total starter requirement in one place.
g
g
g
Total starter across recipes 240 g
Total Starter Needed
340 g
This includes recipe starter plus the amount left behind in your jar.
Not Enough Starter
You will have 225 g total starter
You are short 115 g at this ratio with the amount of starter you entered.
Starter being fed45 g
Flour to add90 g
Water to add90 g
Starter for recipes240 g
Starter left in jar100 g
Split My Dough
Enter your total dough weight and number of loaves to instantly see how much each dough ball should weigh.
Dough Details
g
#
This is especially helpful when you want evenly sized loaves for bannetons, baking times, and final presentation.
Per Loaf
400 g
Each dough ball weight based on your total dough and number of loaves.
Total dough entered1200 g
Number of loaves3