Perfect sourdough, every time.
Free baker’s-percentage calculator. No signup.
Live recipe preview
- Flour
- 460 g
- Water
- 331 g
- Active starter
- 100 g
- Salt
- 9.7 g
Pro mode
Every baker's percentage on one screen. Numbers update as you type.
| Flour | 0 g |
|---|---|
| Water | 0 g |
| Active starter | 0 g |
| Salt | 0 g |
| Weight per loaf | 0 g |
How would you like to start?
Do you already know how much flour and starter you want to use?
Your flour and starter
Enter your amounts. We'll calculate water and salt for your chosen hydration.
How much starter do you have?
We'll build the recipe around your levain—no waste, no guesswork.
How many loaves?
Choose size per loaf in the next step.
Loaf size
Dough weight per loaf. Total batch = loaves × size.
Hydration level
Water affects dough texture. Higher = more open crumb but trickier to handle.
Flour mix
Whole wheat and rye absorb more water. We automatically add water to the recipe based on your choice.
Room temperature?
Affects how long fermentation takes.
Your recipe
Here's your custom sourdough. Happy baking!
Your recipe
Baker's percentages—adjust to taste. Values update live.
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Bulk fermentation timer
Watch for 50% volume increase and a domed top — don't rely on time alone.
Other dough calculators
How baker’s percentage works
Every weight in your recipe is expressed as a percentage of the total flour. Flour is always 100%.
Hydration is the water-to-flour ratio. 72% hydration means 720 g water for every 1,000 g flour. Higher hydration produces an open, holey crumb; lower hydration is easier to shape.
Salt and levain are also percentages of flour. 2.1% salt and 20% levain are common starting points for sourdough. The numbers stay constant whether you bake one loaf or ten — just scale the total.