Cooking Sourdough Starter Feed Ratio Calculator
Starter-feed inventory from caller starter:flour:water mass ratios and independent retained starter composition; not existing overall dough hydration or biological feeding frequency. Caller establishes matching ingredient basis and method. Not food-safety, doneness, preservation or allergy certification.
Description
Starter feeding adds flour and water to an already mixed starter.
Starter feeding adds flour and water to an already mixed starter.1
Final hydration must include both components already present in the retained starter. Use Cooking Sourdough Starter Feed Ratio Calculator to evaluate the supplied inputs under the specific model below.
When to use Cooking Sourdough Starter Feed Ratio Calculator
Use Cooking Sourdough Starter Feed Ratio Calculator to evaluate the supplied inputs under the specific model below. Establish the units, measurement scope and applicable model or recipe assumptions before entering values.
How to use Cooking Sourdough Starter Feed Ratio Calculator and understand its results
- Establish the units, measurement scope and applicable model or recipe assumptions before entering values.
- Enter Observed retained starter mass g, Caller flour feed per starter mass, Caller water feed per starter mass, Independent starter water fraction using the field table and validation rules below, then run the tool.
- Read Caller added flour g, Caller added water g, Conditional fed starter hydration percent and interpret units, signs, ordering and placeholders as explained below.
- If the tool reports an input error, correct that field and rerun. A successful false result, empty match list or unknown-evidence placeholder has the specific meaning described here; check the limitations before applying the result.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| observedRetainedStarterMassG | Observed retained starter mass g | number | Required; constraints below |
| callerFlourFeedPerStarterMass | Caller flour feed per starter mass | number | Required; constraints below |
| callerWaterFeedPerStarterMass | Caller water feed per starter mass | number | Required; constraints below |
| independentStarterWaterFraction | Independent starter water fraction | number | Required; constraints below |
Enter nonnegative starter mass, flour-feed and water-feed ratios, and an initial starter water mass fraction from 0 to 1. Feed amounts are starter mass times each ratio. Include the starter's existing flour and water in final hydration; total flour must be positive. Feed ratios are relative to starter mass and no ideal schedule or microbial activity is selected.
addedFlour = starter×flourFeedRatio; addedWater = starter×waterFeedRatio; hydrationPercent = 100×totalWater/totalFlour Field order, units and branch conditions follow the implementation explanation above.
| Output field | Meaning | Value type |
|---|---|---|
| callerAddedFlourG | Caller added flour g | number |
| callerAddedWaterG | Caller added water g | number |
| conditionalFedStarterHydrationPercent | Conditional fed starter hydration percent | number |
{
"input": {
"observedRetainedStarterMassG": 20,
"callerFlourFeedPerStarterMass": 2,
"callerWaterFeedPerStarterMass": 1,
"independentStarterWaterFraction": 0.5
},
"output": {
"callerAddedFlourG": 40,
"callerAddedWaterG": 20,
"conditionalFedStarterHydrationPercent": 60
}
}Limitations and assumptions
Final hydration must include both components already present in the retained starter. Apply the exact scope and assumptions described above.
All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse arrays fail validation. Domain-specific bounds, alignments and supported tokens are stated above; extremely large inputs or outputs can also be rejected. These errors differ from successful results such as false, no matches or unknown evidence.
Alternative or Complementary methods
Use Cooking Sourdough Hydration Calculator for a related task: Sourdough hydration divides total water by total flour including starter contributions.
Use Cooking Sourdough Bulk Fermentation Time Calculator for a related task: Bulk fermentation response depends on the submitted temperature calibration and starter conditions.
References
Similar or alternative tools
- Cooking Sourdough Hydration Calculator
Sourdough hydration divides total water by total flour including starter contributions.
- Cooking Sourdough Bulk Fermentation Time Calculator
Bulk fermentation response depends on the submitted temperature calibration and starter conditions.