FERMENTATION MATH / CALCULATOR
Sourdough Starter Feeding Calculator
Calculate flour, water, and carryover starter needed for any feeding ratio (1:1:1, 1:2:2, 1:5:5) for a target levain.
Built for Food & Craft workflows, the Sourdough Starter Feeding Calculator evaluates Target Levain / Starter Needed (g), Feeding Ratio: Starter Part (part), Feeding Ratio: Flour Part (parts) using the explicit formula (Parts = S + F + W; Starter = Target ÷ Parts × S; Flour = Target ÷ Parts × F; Water = Target ÷ Parts × W). Instead of relying on rules of thumb, you can audit every variable and see how changing Target Levain / Starter Needed or Feeding Ratio: Water Part impacts the final flour & water to add.
Default baseline with Target Levain / Starter Needed = 150 g yields 60 g flour & water (flour & water to add).
MATHEMATICAL FORMULA
Parts = S + F + W; Starter = Target ÷ Parts × S; Flour = Target ÷ Parts × F; Water = Target ÷ Parts × W
Computed directly from Target Levain / Starter Needed (g), Feeding Ratio: Starter Part (part), Feeding Ratio: Flour Part (parts) with zero server latency so Food & Craft practitioners can verify how Target Levain / Starter Needed drives flour & water to add.
Worked Real-World Example
Suppose you are running a Sourdough Starter Feeding Calculator calculation with default baseline inputs: Target Levain / Starter Needed = 150 g, Feeding Ratio: Starter Part = 1 part, Feeding Ratio: Flour Part = 2 parts, Feeding Ratio: Water Part = 2 parts. Applying the equation (Parts = S + F + W; Starter = Target ÷ Parts × S; Flour = Target ÷ Parts × F; Water = Target ÷ Parts × W), the calculator yields a primary result of 60 g flour & water (flour & water to add), along with secondary breakdown details of 30 g carryover starter + 60 g flour + 60 g water.
Assumptions, Tolerances & Limitations
Culinary, fermentation, and craft chemistry formulas depend on ambient kitchen temperature, relative humidity, flour protein absorption, and digital gram-scale precision (±0.1 g). Always weigh ingredients by mass rather than volumetric cups. Specifically for Sourdough Starter Feeding Calculator, ensure Target Levain / Starter Needed and Feeding Ratio: Water Part are measured in consistent g before finalizing orders or specifications.
Methodology & Standards: Methodology: Derived from published industry standards, trade specifications, and peer-reviewed mathematical formulations for Food & Craft.
STEP-BY-STEP GUIDE
How to use the Sourdough Starter Feeding Calculator
Use the three steps below to configure Target Levain / Starter Needed (g), Feeding Ratio: Starter Part (part), Feeding Ratio: Flour Part (parts) and interpret the flour & water to add for Sourdough Starter Feeding Calculator.
Start by setting Target Levain / Starter Needed = 150 g and related Food & Craft inputs.
Confirm unit consistency across Target Levain / Starter Needed (g), Feeding Ratio: Starter Part (part), Feeding Ratio: Flour Part (parts).
Compare the computed 60 g flour & water baseline against your project requirements.
FREQUENTLY ASKED QUESTIONS
What is the primary calculation performed by the Sourdough Starter Feeding Calculator?
The Sourdough Starter Feeding Calculator calculates Calculate flour, water, and carryover starter needed for any feeding ratio (1:1:1, 1:2:2, 1:5:5) for a target levain. according to the verified formula Parts = S + F + W; Starter = Target ÷ Parts × S; Flour = Target ÷ Parts × F; Water = Target ÷ Parts × W.
How do I ensure maximum accuracy with this calculator?
Always measure actual physical dimensions and parameters rather than nominal estimates, keep units consistent, and include recommended safety or waste allowances.
Can I copy and share the calculation results?
Yes. Click the 'Copy result' button to copy the complete formatted calculation and input record directly to your clipboard for job estimates or documentation.