Sourdough Feeding Calculator accuracy and testing

Formula source

• Adjusted target = target starter x (1 + buffer percent). Feed weight = adjusted target - seed starter. Added flour and water are split by target hydration.

Test cases

Known limitations

• This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
• Use the result as a planning estimate unless the calculator page states a stricter purpose.

Assumptions

• All prices, rates, package sizes, and recipe values are user-entered unless clearly labeled as a general planning default.
• Calculations run locally in your browser and do not store food, nutrition, household, or budget details.
• This is planning math, not nutrition, medical, allergen, or food-safety advice.

Unit handling

• Seed Starter accepts values in g.
• Target Starter accepts values in g.
• Target Hydration accepts values in %.
• Extra Buffer accepts values in %.
• Flour to Add is displayed in g.
• Water to Add is displayed in g.
• Final Starter is displayed in g.

Rounding rules

• Number displays use up to 2 decimal places in the calculator UI.
• Input precision follows configured step values where provided.

Version history

Change log