How to Feed a 1:2:2 Sourdough Starter Ratio to Make 60g (Same-Day 6 - 8 hrs Peak)
Fast same-day levain build math to make 60g of active starter (100% Liquid) using a 1:2:2 feeding ratio.
The arithmetic of a 1:2:2 feeding is simple: 60g of culture divided by 5 parts gives 12.0g per part, so the seed is 12g, the fresh flour is 24g and the water is 24g. At 100% Liquid this balanced 6–8 hour morning levain build build ripens in 6 - 8 hrs. If you keep a 20g jar remainder, feed 80g instead: 16g seed, 32g flour, 32g water — zero discard, permanently.
- Exact 60g Build
- 12g : 24g : 24gStarter : Flour : Water (1:2:2)
- 60g + 20g Jar Reserve
- 16g : 32g : 32gBuilds 80g total (0g discard waste)
- Estimated Peak Window
- 6 - 8 hrsAt 74°F–76°F (23.5°C–24.5°C)
- Levain Hydration
- 100%Balanced 6–8 hour morning levain build
Reference Table: 1:2:2 Ratios at 60g and Its Neighbours
Comparison of 1:2:2 builds either side of 60g, with ripening windows quoted at 75°F (24°C).
| Target Build Weight | Ripe Seed (1) | New Flour (2) | Liquid (2) | Time to Full Dome |
|---|---|---|---|---|
| 50g 1:2:2 levain [Baseline] | 10g seed culture | 20g flour | 20g water | peak 6 - 8 hrs |
| 80g 1:2:2 levain Trimmed Read | 16g seed culture | 32g flour | 32g water | peak 6 - 8 hrs |
| 60g 1:2:2 levain Extended Read | 12g seed culture | 24g flour | 24g water | peak 6 - 8 hrs |
| 40g 1:2:2 levain Compact Read | 8g seed culture | 16g flour | 16g water | peak 6 - 8 hrs |
| 70g 1:2:2 levain Generous Read | 14g seed culture | 28g flour | 28g water | peak 6 - 8 hrs |
Dynamic Stoichiometric Workbench (12g : 24g : 24g)
Test custom loaf weights or alternative fermentation schedules directly against the 16g : 32g : 32g benchmark above.
Fast Same-Day Kinetics: Why a 1:2:2 Ratio Peaks in 6 - 8 hrs (60g Build)
Flour quality matters more than ratio labels at this size: 24g of fresh flour feeding 12g of seed at 100% Liquid determines how much maltose the amylase releases per hour, which in turn sets the 6 - 8 hrs ripening curve at 75°F.
Hydration discipline at 100% Liquid means the 24g of water should be room temperature, not hot. Water above 95°F can shock the lactobacilli and stall the 6 - 8 hrs peak, while water below 60°F pushes fermentation into a slow acidifying phase that flattens the eventual rise.
Zero-Discard Scraping Method for 60g Levain (1:2:2)
- Check Room Temperature: Confirm your kitchen is close to 75°F (24°C). At 68°F a 1:2:2 feed stretches toward 6 - 8 hrs of extra ripening, and at 82°F it contracts noticeably.
- Build the 80g Base (16g Seed): Feed your seed culture with 32g of flour and 32g of water at 100% Liquid.
- Watch for the Convex Dome (6 - 8 hrs): The surface should bulge into a smooth pillow and jiggle when gently shaken, not collapse flat.
- Split the Peak (60g Out, 20g Back): Use 60g of the 80g build in your dough and restart the cycle with the 20g that is left.
Key Baker's Math Questions (Exact 60g Build: 12g : 24g : 24g)
Does the 60g figure include the jar remnants?
No. 60g is the usable levain you take out of the jar; the jar build is 80g so that 20g of culture always survives the transfer.
What happens if I use 1:2:2 starter in a very wet dough?
The 100% Liquid levain carries less acid, so a wet dough keeps more of its elasticity. Hold back a little extra water if your flour absorbs like 24g of bread flour does.
How many grams of starter, flour and water make 60 grams at a 1:2:2 ratio?
12g starter + 24g flour + 24g water = 60 grams, split across 5 parts of 12.0g each.