Sourdough Starter Feeding Table: Flour to add by Starter weight
Reference table of flour to add for Sourdough Starter Feeding across a range of starter weight values — exact, engine-computed figures you can read off at a glance.
Sourdough Starter Feeding Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Flour to add
50
- Water to add
- 50
- Total after feeding
- 150
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Sourdough Starter Feeding Calculator
The Sourdough Starter Feeding Calculator works out your flour to add, along with 2 related figures in an instant. Enter starter weight, flour ratio and water ratio and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the starter weight.
- Enter the flour ratio.
- Enter the water ratio.
- Read off your flour to add, together with water to add and total after feeding — the calculator updates automatically, with no button to press.
Formula
The Sourdough Starter Feeding Calculator uses the formula:
Flour to add = Starter weight × Flour ratio
Worked example
For example, with starter weight of 50 g, flour ratio of 1 and water ratio of 1, the flour to add is 50.
| Starter weight | 50 g |
|---|---|
| Flour ratio | 1 |
| Water ratio | 1 |
| Flour to add | 50 |
|---|---|
| Water to add | 50 |
| Total after feeding | 150 |
Results are estimates for educational use, not professional advice.
Key terms explained
- Ratio
- A comparison of two quantities showing how many times one contains the other.
Frequently asked questions
Multiply the starter weight by the flour and water ratios. With 50 g starter at a 1:1:1 ratio, add 50 g flour and 50 g water.
Equal parts starter, flour and water by weight, a common balanced feed that keeps the starter active.
More flour and water relative to starter (such as 1:5:5) slows the rise, useful for feeding before a long wait.
Usually yes. Removing some starter before feeding keeps the amount manageable and the culture healthy.
The Sourdough Starter Feeding Calculator uses the formula: Flour to add = Starter weight × Flour ratio. For example, with starter weight of 50 g, flour ratio of 1 and water ratio of 1, the flour to add is 50.
Enter the starter weight. Enter the flour ratio. Enter the water ratio. Read off your flour to add, together with water to add and total after feeding — the calculator updates automatically, with no button to press.
Related guides
How to Calculate Sourdough Starter Feeding: Formula, Steps & Examples
Learn how to calculate Sourdough Starter Feeding — the formula explained step by step, with worked examples and a free calculator to check your answer.