Bread Starter Feeding
Calculate new starter weight after feeding flour and water.
About Bread Starter Feeding
Adding the fed flour and water to the carried starter gives the fresh total, with hydration of the new feed shown. Feeding a starter predictably keeps fermentation healthy, and knowing the hydration keeps the ratios you depend on.
Formula
Bread Starter Feeding
New total = carried + flour + water; fed hydration = water / flour
- carried starter
- Amount kept back from the previous mix to feed
Worked example
With the default values below, Bread Starter Feeding returns New Starter Total of 350.0. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Carried starterminimum 0 g
- 150 g
- Flour to addminimum 0 g
- 100 g
- Water to addminimum 0 g
- 100 g
Results
- New Starter Total
- 350.0 g
- Fed Amount
- 200.0 g
- Fed Hydration
- 100.0%
Step by step
- 1Values used
- 2Bread Starter Feeding
- 3New Starter Total= 350.0 g
- 4Fed Amount= 200.0 g
- 5Fed Hydration= 100.0
Assumptions and limits
- The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 1 decimal place, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Bread Starter Feeding calculated?
New total = carried + flour + water; fed hydration = water / flour Adding the fed flour and water to the carried starter gives the fresh total, with hydration of the new feed shown.
Why does Bread Starter Feeding matter?
Feeding a starter predictably keeps fermentation healthy, and knowing the hydration keeps the ratios you depend on.
What values do I need to enter?
This calculator takes 3 inputs: Carried starter, Flour to add, Water to add. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.