⏳ Sourdough Levain Planner
Sourdough Starter Feeding Calculator
Scale your feeding quantities to build the exact amount of ripe starter needed for your dough with zero discard waste.
Single Loaf: ~100gDouble Loaf: ~200g
22°C / 72°F
Standard bake-day feed. Perfect for feeding before work or late morning.
Feeding Formula for 150g Starter
Starter Seed30g
Water (Room Temp)60g
Flour (White or Blend)60g
Estimated Peak Rise Window:6–9 hours
How to Know When Your Starter is at Peak
1. Domed to Flat Top
A rising starter has a convex (domed) center. When it levels out flat, it has peaked and is at maximum yeast activity.
2. Sponge Webbing
Look through the glass jar: you should see vertical aeration channels and a webbed, honeycomb gluten network.
3. Pleasant Aroma
Should smell sweet, fruity, and mildly alcoholic—not intensely vinegary or nail-polish-like (which indicates hunger).