Overnight 1:6:6 Sourdough Starter Feeding Ratio to Build 75g (12 - 16 hrs Peak Window)
High-dilution overnight levain math to build 75g of sweet, de-acidified starter (100% Liquid) with zero morning collapse.
A 1:6:6 refresh for 75g splits the jar into 13 equal units of 5.8g — 6g ripe seed, 35g fresh flour, 34g water. Those three weights total exactly 75g, and the culture reaches a full dome in 12 - 16 hrs at 75°F. Building 95g instead (7g / 44g / 44g) leaves the 20g jar reserve so nothing is ever thrown away. Best for: Warm summer overnight build (77°F–79°F).
- Exact 75g Build
- 6g : 35g : 34gStarter : Flour : Water (1:6:6)
- 75g + 20g Jar Reserve
- 7g : 44g : 44gBuilds 95g total (0g discard waste)
- Estimated Peak Window
- 12 - 16 hrsAt 74°F–76°F (23.5°C–24.5°C)
- Levain Hydration
- 100%Warm summer overnight build (77°F–79°F)
1:6:6 Sourdough Starter Feeding Chart Around a 75g Build
Every row recalculates the 1:6:6 ratio from scratch so the seed, flour and water columns stay internally consistent.
| Levain Yield to Build | Seed Culture (1 Part) | Added Flour (6 Parts) | Added Water (6 Parts) | Ripening Window at 75°F |
|---|---|---|---|---|
| 1:6:6 @ 75g [Exact Build] | starter 6g / flour 35g | water 34g | hydration 100% Liquid | 12 - 16 hrs at 75°F |
| 1:6:6 @ 65g Slightly Leaner | starter 5g / flour 30g | water 30g | hydration 100% Liquid | 12 - 16 hrs at 75°F |
| 1:6:6 @ 85g Slightly Fuller | starter 7g / flour 39g | water 39g | hydration 100% Liquid | 12 - 16 hrs at 75°F |
| 1:6:6 @ 55g Much Leaner | starter 4g / flour 25g | water 26g | hydration 100% Liquid | 12 - 16 hrs at 75°F |
| 1:6:6 @ 95g Much Fuller | starter 7g / flour 44g | water 44g | hydration 100% Liquid | 12 - 16 hrs at 75°F |
Dynamic Stoichiometric Workbench (6g : 35g : 34g)
Test custom loaf weights or alternative fermentation schedules directly against the 7g : 44g : 44g benchmark above.
De-Acidifying Your Culture: Why High-Ratio 1:6:6 Feeds Maximize Oven Spring (75g Build)
Flour quality matters more than ratio labels at this size: 35g of fresh flour feeding 6g of seed at 100% Liquid determines how much maltose the amylase releases per hour, which in turn sets the 12 - 16 hrs ripening curve at 75°F.
If your culture is sluggish or smells sharply of vinegar, the ratio is usually not the culprit — the culture is. Two consecutive warm 1:6:6 refreshes, each feeding 35g of fresh flour against 6g of tired seed, strip out accumulated acetic acid and restore yeast vigour faster than any other single intervention.
Zero-Discard Scraping Method for 75g Levain (1:6:6)
- Zero the Scale and Pre-weigh (7g / 44g / 44g): Set out three vessels and weigh each ingredient before you open the starter jar.
- Bloom the Seed (7g): Add the 7g of ripe seed to 44g of water and stir until the mixture becomes a uniform cloudy suspension.
- Add Flour in Two Pours (44g): Incorporate half the flour, wait 20 minutes for hydration, then work in the remainder so no dry pockets survive.
- Ferment to a Dome (12 - 16 hrs): At 75°F the 1:6:6 culture should double and dome in 12 - 16 hrs; pull 75g at peak and return 20g to the fridge.
Key Baker's Math Questions (Exact 75g Build: 6g : 35g : 34g)
Why does my 1:6:6 levain smell sour instead of sweet?
Sourness means the seed was over-acidic going in. Feed 35g of fresh flour against 6g of the old starter twice in a row at 78°F and the taint disappears.
How many grams of starter, flour and water make 75g at a 1:6:6 ratio?
6g starter + 35g flour + 34g water = 75g, split across 13 parts of 5.8g each.
How long does a 1:6:6 feeding take to peak?
At 75°F (24°C) the culture domes in 12 - 16 hrs; a cooler room adds roughly 3.8% for every degree below that.