Sourdough Calculator
Calculate sourdough starter feeding ratios and levain builds.
Scratchpad (not saved)
Save to create a persistent, shareable workspace.
What This Calculator Does
Calculate sourdough starter feeding ratios and levain builds.
It combines Starter Amount, Flour Ratio, Water Ratio, Target Levain Weight to estimate Total Levain Weight, Starter Amount, Flour Needed.
Formula & Method
Notation used in the formulas: R = Total Levain Weight; x_{1} = Starter Amount; x_{2} = Flour Ratio; x_{3} = Water Ratio; x_{4} = Target Levain Weight.
Method summary: inputs are normalized to consistent units, core equations are evaluated, then secondary values are derived and rounded for display.
Use this calculator for quick scenario analysis. Start with baseline values, change one driver at a time, and compare how sensitive the results are to each input shown above.
Inputs Used
- Starter Amount: Amount of existing starter
- Flour Ratio: Parts flour per part starter
- Water Ratio: Parts water per part starter
- Target Levain Weight: Target levain weight (0 = use ratio)
Related Calculators
- Recipe Scaler — Multiply or divide recipe ingredient amounts for a different number of servings.
- Serving Size Calculator — Calculate per-serving and per-person amounts from a total quantity of food.
- Batch Calculator — Calculate how many batches to make and total ingredient needs for large-scale recipe production.
- Baker's Percentage — Calculate baker's percentages - all ingredients as a percentage of flour weight.
- Yeast Conversion — Convert between fresh yeast, active dry yeast, and instant yeast.
- Pan Size Converter — Convert recipe amounts between different pan shapes and sizes.
- Egg Substitution — Calculate common egg substitute amounts for baking.
- Flour Conversion — Convert between volume and weight measurements for different flour types.