🍞SourdoughCalc
Hydration × Flour Weight FormulaVerified Hydration × Flour Weight Formula Benchmark

300g Flour at 65% Low-Hydration Sourdough: 185g Water, 60g Starter & 6.6g Salt (1 Small Boule)

Stiff 65% formula for 300g flour (552g dough, 1 small boule), deducting 10g starter water from 195g.

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

In a 300g flour formula at 65%, naive baker's math (195g water + 60g starter) overshoots to 68.2% (+3.2% above spec) across 330g total flour. Setting your scale to 185g water (-10g deduction) and 6.6g salt in a 552g batch locks True Total Hydration at 65.15% (target 65%).

Strict True Hydration Water
185gLocks True Total Hydration at 65.15% (target 65%, -10g)
Unadjusted Apparent Water
195gPushes True Hydration to 68.2% (+3.2% surge)
20% Active Starter & Salt
60g / 6.6g30g hidden flour + 30g hidden water
Stickiness & Rheology
1 / 5 StarsBeginner Friendly (Low extensibility)

True (65.15%) vs Apparent (68.2%) Matrix for 300g Flour

Pre-computed gram weights around 300g main flour where 185g water locks True Total Hydration at 65.15% (target 65%).

Batch & Seed SpecFlour BreakdownLevain SplitCorrected Water (65% Ref)Salt & Dough MassApparent vs Locked
250g @ 63% (15% Seed) Reduced Flour (-50g)250g + 19g = 269g (65%/300g ref)38g (19gF/19gW @ 100%)150g W (vs 158g app @ R1)5.4g salt (438g dough)65.8% drift → 62.83% (63% goal)
300g @ 63% (18% Seed) Stiffer Step (-2%)300g + 30g = 330g (65%/300g ref)54g (30gF/24gW @ 80%)184g W (vs 189g app @ R2)6.6g salt (538g dough)64.5% drift → 63.03% (63% goal)
300g @ 65% (20% Seed) [Primary Formula]300g + 30g = 330g (65%/300g ref)60g (30gF/30gW @ 100%)185g W (vs 195g app @ R3)6.6g salt (545g dough)68.2% drift → 65.15% (65% goal)
300g @ 67% (22% Seed) Wetter Step (+2%)300g + 33g = 333g (65%/300g ref)66g (33gF/33gW @ 100%)190g W (vs 201g app @ R4)6.7g salt (556g dough)70.3% drift → 66.97% (67% goal)
350g @ 67% (25% Seed) Up-Scaled (+50g)350g + 39g = 389g (65%/300g ref)88g (39gF/49gW @ 125%)212g W (vs 235g app @ R5)7.8g salt (650g dough)73.0% drift → 67.1% (67% goal)

Real-Time Dough & Starter Scaling Sandbox

Scale this Stiff 65% Low-Hydration Sourdough Re specification up or down on your digital scale with zero hydration drift.

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Strict True Hydration Water:
185g — Locks True Total Hydration at 65.15% (target 65%, -10g)
Unadjusted Apparent Water:
195g — Pushes True Hydration to 68.2% (+3.2% surge)
20% Active Starter & Salt:
60g / 6.6g — 30g hidden flour + 30g hidden water

Why 65% Low-Hydration Sourdough (300g Flour / 185g Water) Holds Spring

Introducing 60g ripe culture into 300g flour contributes 30g degraded gluten and 30g organic-acid water, pushing an unadjusted 195g pour to 68.2% (+3.2% surge). Weighing 185g water (167g autolyse + 18g bassinage) and 6.6g salt across 330g flour locks True Total Hydration at 65.15% (target 65%).

Balancing low extensibility against high tenacity elasticity in a 552g (300g flour) batch at 65% requires strict 185g water control (-10g vs 195g), 60g peaked starter (30gF/30gW), and 6.6g salt staged with 18g water.

Execution Schedule: 300g Flour, 185g Water & 60g Starter (65.15%)

  1. 90% Water Autolyse (167g / 185g): Mix 300g unbleached flour with 167g water and rest covered 45 min to initiate glutenin linking.
  2. 10% Bassinage & Starter Addition (18g W + 60g Levain): Add 60g starter (30gF/30gW), 6.6g salt, and 18g water for 65.15% (65%) across 330g flour.
  3. Viscoelastic Folding (552g Batch, Beginner Friendly): Complete 4 coil folds at 30-min intervals to balance low extensibility.
  4. Cold Fermentation & Bake (300g Base): Shape into a taut 1 small boule, chill 14 hrs at 38°F, and bake 42 min total at 450°F.

Diagnostic Answers: Stiff 65% Low-Hydration Sourdough Recipe for

How many loaves does 300g flour at 65% hydration (552g) make?

A 300g flour formula with 185g water, 60g starter, and 6.6g salt produces 552g total dough—ideal as 1 Small Boule at 65.15% (65%).

How much starter and salt go into 300g flour at 65% hydration?

At 20% inoculation and 2% total-flour salt, combine 300g flour with 60g active starter (30gF + 30gW), 185g water, and 6.6g salt (2% of 330g total flour) for a 552g batch.

How does 167g autolyse water improve a 300g loaf at 65%?

Soaking 300g flour in 167g water for 45 minutes before adding 60g acidic starter, 6.6g salt, and 18g water (185g total) builds high tenacity elasticity across the 552g dough.

Next-Step Reference Tables (185g Context)

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