Sourdough Starter Levain Inoculation & Net Dough Hydration Calculator

Compute true sourdough hydration % including starter flour + water contributions.

True Net Sourdough Hydration
76 %
Total Combined Flour (100% Base) 500 g
Total Combined Water 380 g
Total Mixed Dough Weight 890 g
Inputs
g
Dry flour weight added directly to the mix in grams.
g
Water weight added directly to the mix in grams.
g
Active sourdough levain / starter weight added in grams.
%
Hydration percentage of your sourdough starter (100% = equal flour & water).
g
Fine sea salt weight in grams.
Results & Graph
True Net Sourdough Hydration
76 %
Total Combined Flour (100% Base)
500 g
Total Combined Water
380 g
Total Mixed Dough Weight
890 g

True Net Sourdough Hydration

Graph 1 • Main Flour Grams Sensitivity Recalculates the domain equation across 50% to 150% of the primary input while holding other parameters constant.
0 % 74.6 % 149.2 % 50%: 138.18 % 138.2 50% 75%: 98.06 % 98.1 75% 100%: 76 % 76 100% 125%: 62.04 % 62.0 125% 150%: 52.41 % 52.4 150%
Graph 2 • Primary & Supporting Metric Comparison Compares the primary output alongside supporting domain benchmarks.
True Net Sourdough Hydration 76 % Total Combined Flour (100% Base) 500 g Total Combined Water 380 g Total Mixed Dough Weight 890 g
Graph 3 • Exact Output Table & Units Displays each calculated output in its exact domain unit.
True Net Sourdough Hydration76 %Total Combined Flour (100% Base)500 gTotal Combined Water380 gTotal Mixed Dough Weight890 g
Summary: Including 50g flour and 50g water inside the 100g starter, total flour is 500g and total water is 380g (76% true hydration).
Summary: Including 50g flour and 50g water inside the 100g starter, total flour is 500g and total water is 380g (76% true hydration).
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Interactive chart & math engine powered by CalculatorGraph

Formula & Mathematical Methodology: Sourdough & Levain Formula

TotalFlour = MainFlour + Starter × (1 / (1 + StarterHydration))
TotalWater = MainWater + Starter − StarterFlour
TrueHydration% = (TotalWater / TotalFlour) × 100
TotalFlour = MainFlour + Starter × (1 / (1 + StarterHydration)); TotalWater = MainWater + Starter − StarterFlour; TrueHydration% = (TotalWater / TotalFlour) × 100
  • mainFlourGrams: Main Flour Grams (g)
  • mainWaterGrams: Main Water Grams (g)
  • levainStarterGrams: Levain Starter Grams (g)
  • starterHydrationPct: Starter Hydration Pct (%)
  • saltGrams: Salt Grams (g)

Rounding: Physical package counts round up where appropriate; continuous measurements round to 2 decimal places.

Worked Example: Practical Benchmark: Sourdough & Levain

Compute true sourdough hydration % including starter flour + water contributions.

  1. Enter your project dimensions, machining speeds, or recipe weights.
  2. Compute the governing equation: TotalFlour = MainFlour + Starter × (1 / (1 + StarterHydration)); TotalWater = MainWater + Starter − StarterFlour; TrueHydration% = (TotalWater / TotalFlour) × 100.
  3. Review the primary result, supporting dimensions, and 3 SVG visualizations.
Result: Computes Sourdough & Levain via TotalFlour = MainFlour + Starter × (1 / (1 + StarterHydration)); TotalWater = MainWater + Starter − StarterFlour; TrueHydration% = (TotalWater / TotalFlour) × 100.

Frequently Asked Questions

How does the Sourdough Starter Levain Inoculation & Net Dough Hydration Calculator calculate results?

It evaluates TotalFlour = MainFlour + Starter × (1 / (1 + StarterHydration)); TotalWater = MainWater + Starter − StarterFlour; TrueHydration% = (TotalWater / TotalFlour) × 100 directly in your browser and plots three custom SVG visualizations.

Can I compare different material dimensions or batch sizes side by side?

Yes. Click "Compare (0/3)" in the results toolbar to pin up to 3 scenarios side by side.

Can I print a clean shop or kitchen reference sheet?

Yes. Click the Print button in the results toolbar for a distraction-free worksheet.

Everyday Life · Kitchen & Culinary

Sourdough Starter Levain Inoculation & Net Dough Hydration Calculator: inputs, method, and how to read the result

Compute true sourdough hydration % including starter flour + water contributions.

Choose inputs for the case you are checking

The defaults are illustrative. Replace them with values for your case and keep the units shown beside each field.

  • Main Flour Grams: Dry flour weight added directly to the mix in grams.
  • Main Water Grams: Water weight added directly to the mix in grams.
  • Levain Starter Grams: Active sourdough levain / starter weight added in grams.
  • Starter Hydration Pct: Hydration percentage of your sourdough starter (100% = equal flour & water).

What the calculation includes

With the default values shown, True Net Sourdough Hydration is 76 %. The calculation follows Sourdough & Levain Formula; the formula and variable definitions above show how the inputs combine.

One-input check: With the other defaults held constant, changing Main Flour Grams from 450 g to 495 g changes True Net Sourdough Hydration from 76 % to 69.72 %. This is a comparison inside the calculator's stated model, not a prediction.

Where to use caution

  • Uses standard North American & metric trade dimensions, Machinery’s Handbook formulas, and culinary weight ratios.
  • Verify local municipal building codes, tool manufacturer limits, and food-safety time/temperature tables before execution.

Scope: Trade, Shop & Culinary Science Reference Standard Check the assumptions and limitations against your situation before relying on the estimate.

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