Overnight 1:8:8 Sourdough Starter Feeding Ratio to Build 200g (12 - 16 hrs Peak Window)
High-dilution overnight levain math to build 200g of sweet, de-acidified starter (100% Liquid) with zero morning collapse.
There are exactly 17 parts in a 1:8:8 feed. At 200g that is 11.8g per part — 12g of it is the seed culture you already own, 94g is new flour and 94g is water. Expect a 12 - 16 hrs window to full dome at 75°F. The zero-discard version builds 220g (13g / 104g / 103g) so 20g always survives in the jar. Suits Extended 14-hour high-dilution de-acidifying feed.
- Exact 200g Build
- 12g : 94g : 94gStarter : Flour : Water (1:8:8)
- 200g + 20g Jar Reserve
- 13g : 104g : 103gBuilds 220g 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
Gram-by-Gram 1:8:8 Levain Breakdown for 200g (100% Liquid)
Weights derived from the 17-part 1:8:8 division, where one part equals 11.8g.
| How Much to Make | Starter (1 Part) | Flour (8 Parts) | Water (8 Parts) | Peak Hours (75°F) |
|---|---|---|---|---|
| Levain build 200g ([Exact Build]) | 12g cultured seed | 94g sifted flour + 94g liquid | zero-waste reserve 20g | 12 - 16 hrs dome window |
| Levain build 210g (Slightly Leaner) | 12g cultured seed | 99g sifted flour + 99g liquid | zero-waste reserve 20g | 12 - 16 hrs dome window |
| Levain build 190g (Slightly Fuller) | 11g cultured seed | 89g sifted flour + 90g liquid | zero-waste reserve 20g | 12 - 16 hrs dome window |
| Levain build 220g (Much Leaner) | 13g cultured seed | 104g sifted flour + 103g liquid | zero-waste reserve 20g | 12 - 16 hrs dome window |
| Levain build 180g (Much Fuller) | 11g cultured seed | 85g sifted flour + 84g liquid | zero-waste reserve 20g | 12 - 16 hrs dome window |
Dynamic Stoichiometric Workbench (12g : 94g : 94g)
Test custom loaf weights or alternative fermentation schedules directly against the 13g : 104g : 103g benchmark above.
De-Acidifying Your Culture: Why High-Ratio 1:8:8 Feeds Maximize Oven Spring (200g Build)
Monod growth kinetics explain the 12 - 16 hrs window: the 1:8:8 feed drops the seed fraction to 11.8g per 17 parts, so fermentable sugar concentration sits just above the half-saturation constant for 12g of inoculum. Yeast divides fastest while sugar is plentiful, then slows as the 94g of new flour is exhausted and lactic acid accumulates.
Readiness, not the clock, should end the feed. The 1:8:8 culture at 200 g should dome into a taut convex pillow and release gas in visible streaks when the jar is tilted; a levain that merely doubled and stayed flat has not finished fermenting and will underproof the dough.
Zero-Discard Scraping Method for 200g Levain (1:8:8)
- Never Scrap the Jar Clean: Leave a deliberate 13g remnant of starter in the vessel — this is the seed for the next 1:8:8 feed, not waste.
- Top Up with 104g Flour and 103g Water: These two additions convert your remnant into exactly 220g of 100% Liquid levain.
- Wait for the 12 - 16 hrs Peak: Confirm the dome and the escaping gas streaks before you need the levain.
- Return the Surviving 20g: Whatever levain is left after your bake goes straight back into the jar and the refrigerator, and the cycle repeats without a single discarded gram.
Key Baker's Math Questions (Exact 200g Build: 12g : 94g : 94g)
Why is my 1:8:8 starter not doubling?
Usually the seed was neglected in the refrigerator. Two warm 1:2:2 refreshes at 76–78°F, each with 94g of fresh flour, will strip the acid and restart the yeast.
Can I make 200g of sourdough culture with a stiff 50% starter?
A 1:8:8 feed already produces 100% liquid sourdough culture. For a 50% final hydration you would instead use 94g flour and 94g water.
Is a 1:8:8 ratio too acidic for a 200g 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.