Overnight 1:8:8 Sourdough Starter Feeding Ratio to Build 50g (12 - 16 hrs Peak Window)
High-dilution overnight levain math to build 50g of sweet, de-acidified starter (100% Liquid) with zero morning collapse.
There are exactly 17 parts in a 1:8:8 feed. At 50 g that is 2.9g per part — 3g of it is the seed culture you already own, 24g is new flour and 23g is water. Expect a 12 - 16 hrs window to full dome at 75°F. The zero-discard version builds 70g (4g / 33g / 33g) so 20g always survives in the jar. Suits Extended 14-hour high-dilution de-acidifying feed.
- Exact 50g Build
- 3g : 24g : 23gStarter : Flour : Water (1:8:8)
- 50g + 20g Jar Reserve
- 4g : 33g : 33gBuilds 70g total (0g discard waste)
- Estimated Peak Window
- 12 - 16 hrsAt 74°F–76°F (23.5°C–24.5°C)
- Levain Hydration
- 100%Extended 14-hour high-dilution de-acidifying feed
Scaling 1:8:8 Feeds Across 30g to 70g
Zero-waste gram breakdown for 1:8:8 (100% Liquid) centred on the 50g target, with the 70g jar reserve alongside.
| Target Levain Yield | Seed Starter (1 Part) | Fresh Flour (8 Parts) | Water (8 Parts) | Peak Ripening Time @ 75°F |
|---|---|---|---|---|
| 40g 1:8:8 ([Your Target]) | seed 2g | fresh flour 19g | room-temp water 19g | peak 12 - 16 hrs at 75°F |
| 70g 1:8:8 (Leaner Read) | seed 4g | fresh flour 33g | room-temp water 33g | peak 12 - 16 hrs at 75°F |
| 50g 1:8:8 (Fuller Read) | seed 3g | fresh flour 24g | room-temp water 23g | peak 12 - 16 hrs at 75°F |
| 30g 1:8:8 (Micro Scale) | seed 2g | fresh flour 14g | room-temp water 14g | peak 12 - 16 hrs at 75°F |
| 60g 1:8:8 (Large Scale) | seed 4g | fresh flour 28g | room-temp water 28g | peak 12 - 16 hrs at 75°F |
Live Parameter Solver for Overnight 1:8:8 Sourdough Starter Feeding
Dial in custom baker's percentages and export your adjusted 3g : 24g : 23g formula for bake day.
De-Acidifying Your Culture: Why High-Ratio 1:8:8 Feeds Maximize Oven Spring (50g Build)
Because the 50g build holds only 3g of live culture, the 24g of flour and 23g of water must supply everything the yeast needs to reach a 12 - 16 hrs peak. Underfeeding therefore produces a sour levain, while a correctly fed 1:8:8 jar domes within hours.
Hydration discipline at 100% Liquid means the 23g of water should be room temperature, not hot. Water above 95°F can shock the lactobacilli and stall the 12 - 16 hrs peak, while water below 60°F pushes fermentation into a slow acidifying phase that flattens the eventual rise.
Zero-Discard Scraping Method for 50g Levain (1:8:8)
- Feed at the Right Moment: For extended 14-hour high-dilution de-acidifying feed, begin the 1:8:8 feed 12 - 16 hrs before you plan to mix dough.
- Mix 4g Seed, 33g Flour, 33g Water: Combine everything in the jar and swirl until the flour is fully hydrated.
- Cover and Rest (12 - 16 hrs): Keep the jar at 75°F, ideally inside a proofing box, until the culture peaks.
- Use 50g and Keep 20g: The levain goes into your dough at full stretch; the reserve becomes the next cycle's 1:8:8 seed.
Cereal Chemistry & Bench Execution FAQs
How many grams of starter, flour and water make 50g at a 1:8:8 ratio?
3g starter + 24g flour + 23g water = 50g, split across 17 parts of 2.9g each.
How much extra should I build so I never run out of starter?
Build 70g in total — 4g starter, 33g flour, 33g water — and the leftover 20g becomes the seed for the next feed.
Is a 1:8:8 ratio too acidic for a 50 grams levain?
No. At 1:8:8 the acid from the previous batch is diluted across 8 parts of flour and 8 parts of water, giving a 100% liquid levain that tastes clean and mild.