🍞SourdoughCalc
Hydration × Flour Weight FormulaCalibrated Rheology Reference (Hydration × Flour Weight Formula)

Country 74% Sourdough Formula for 500g Flour: 357g Water & 100g Levain (1 Standard Loaf)

True 74.0% vs 76.4% apparent breakdown for 500g flour (968g 1 standard loaf, -13g water cut).

Executive Baker's Math Summary (Hydration × Flour Weight Formula)

In a 500g flour formula at 74%, naive baker's math (370g water + 100g starter) overshoots to 76.4% (+2.4% above spec) across 550g total flour. Setting your scale to 357g water (-13g deduction) and 11g salt in a 968g batch locks True Total Hydration at 74.0% (target 74%).

Strict True Hydration Water
357gLocks True Total Hydration at 74.0% (target 74%, -13g)
Unadjusted Apparent Water
370gPushes True Hydration to 76.4% (+2.4% surge)
20% Active Starter & Salt
100g / 11g50g hidden flour + 50g hidden water
Stickiness & Rheology
3 / 5 StarsModerate (High extensibility)

True (74.0%) vs Apparent (76.4%) Matrix for 500g Flour

Stepwise levain inoculation (15%–25%) and hydration offsets for a 968g (1 Standard Loaf) batch using 500g flour.

Batch & Seed SpecFlour BreakdownLevain SplitCorrected Water (74% Ref)Salt & Dough MassApparent vs Locked
450g @ 72% (15% Seed) Lean Seed (-50g)450g + 34g = 484g (74%/500g ref)68g (34gF/34gW @ 100%)314g W (vs 324g app @ R1)9.7g salt (832g dough)74.0% drift → 71.9% (72% goal)
500g @ 72% (18% Seed) Low Inoc (-2% Hyd)500g + 50g = 550g (74%/500g ref)90g (50gF/40gW @ 80%)356g W (vs 360g app @ R2)11.0g salt (946g dough)72.7% drift → 72.0% (72% goal)
500g @ 74% (20% Seed) [Target Baseline]500g + 50g = 550g (74%/500g ref)100g (50gF/50gW @ 100%)357g W (vs 370g app @ R3)11.0g salt (957g dough)76.4% drift → 74.0% (74% goal)
500g @ 76% (22% Seed) High Inoc (+2% Hyd)500g + 55g = 555g (74%/500g ref)110g (55gF/55gW @ 100%)367g W (vs 380g app @ R4)11.1g salt (977g dough)78.4% drift → 76.04% (76% goal)
550g @ 76% (25% Seed) Scaled Batch (+50g)550g + 61g = 611g (74%/500g ref)138g (61gF/77gW @ 125%)387g W (vs 418g app @ R5)12.2g salt (1075g dough)81.0% drift → 75.94% (76% goal)

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Fine-tune starter hydration between 50% stiff and 125% liquid while keeping your hydration × flour weight formula ratios locked.

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Strict True Hydration Water:
357g — Locks True Total Hydration at 74.0% (target 74%, -13g)
Unadjusted Apparent Water:
370g — Pushes True Hydration to 76.4% (+2.4% surge)
20% Active Starter & Salt:
100g / 11g — 50g hidden flour + 50g hidden water

Open Crumb & Gluten Physics at 74% Hydration (500g Flour + 357g Water)

Every 100g of 100% hydration levain blended into 500g flour shifts the true ratio toward 100% by adding 50g water and 50g flour (370g water = 76.4%, +2.4% surge). Holding main water to 357g (407g ÷ 550g) with 11g salt locks True Total Hydration at 74.0% (target 74%).

Ionic shielding from 11g sodium chloride tightens gliadin-glutenin fibrils across 550g flour (500g base + 50g levain) at 74% hydration. Withholding 36g of your 357g water until after a 45-minute 321g autolyse gives the 968g mass supple tenacity.

Rheological Handling Guide (3/5 Tack) for 500g Flour at 74%

  1. 90% Water Autolyse (321g / 357g): Mix 500g unbleached flour with 321g water and rest covered 45 min to initiate glutenin linking.
  2. 10% Bassinage & Starter Addition (36g W + 100g Levain): Add 100g starter (50gF/50gW), 11g salt, and 36g water for 74.0% (74%) across 550g flour.
  3. Viscoelastic Folding (968g Batch, Moderate): Complete 4 coil folds at 30-min intervals to balance high extensibility.
  4. Cold Fermentation & Bake (500g Base): Shape into a taut 1 standard loaf, chill 14 hrs at 38°F, and bake 42 min total at 450°F.

Technical Q&A: Country 74% Sourdough Formula for 500g Flour: 35

What is the total dough weight for 500g flour at 74% hydration?

Summing 500g main flour, 357g corrected water, 100g starter (50gF/50gW), and 11g salt yields 968g of dough (1 Standard Loaf at 74.0%).

How much starter and salt go into 500g flour at 74% hydration?

At 20% inoculation and 2% total-flour salt, combine 500g flour with 100g active starter (50gF + 50gW), 357g water, and 11g salt (2% of 550g total flour) for a 968g batch.

Why does 370g water make my 500g flour dough feel like 76.4%?

Your 100g of 100% starter adds 50g water and 50g flour, turning 370g water into 420g water over 550g flour (76.4%). Dropping 13g to 357g locks True Total Hydration at 74.0% (target 74%).

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