What does 1:1:1 mean?

It means 1 part starter, 1 part flour, 1 part water by weight. So 50 g starter + 50 g flour + 50 g water. This is the most common feeding ratio.

When should I use a higher feeding ratio?

Use 1:2:2 or higher in warm weather, or when you want the starter to peak later (such as overnight). Higher ratios give the yeast more food and slow the rise.

What is starter hydration?

Starter hydration is the water-to-flour ratio. A 1:1 water-to-flour ratio gives 100% hydration. Some bakers maintain stiff starters at 50-60% hydration.

Sourdough Starter Ratio Calculator

Calculate feeding ratios for sourdough starter. Determine how much flour and water to add for each feeding.

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Existing Starter to Keep

Flour Ratio Part

Water Ratio Part

Flour to Add

50 g

Water to Add50 g

Total After Feeding150 g

Starter Hydration100 %

View formula & how it works →

How to Feed Sourdough Starter

Formula

A 1:1:1 feeding means equal parts starter, flour, and water by weight.

Flour to Add = Starter x Flour Ratio Water to Add = Starter x Water Ratio

Common Ratios

1:1:1 - Standard daily feeding

1:2:2 - For slower fermentation / cooler environments

1:5:5 - For very long fermentation schedules

1:3:3 - Good for overnight rise

Example Calculation

Feed 50 g of starter at a 1:1:1 ratio.

01Keep 50 g of starter.
02Add flour: 50 x 1 = 50 g.
03Add water: 50 x 1 = 50 g.
04Total: 50 + 50 + 50 = 150 g at 100% hydration.

Frequently Asked Questions

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Recipe Scaling Guide - How to Double, Halve, or Adjust Any Recipe

Learn how to scale recipes up or down accurately. Covers multiplying ingredients, adjusting cooking times and temperatures, and avoiding common scaling mistakes.

Sourdough Starter Ratio Calculator

How to Feed Sourdough Starter

Formula

Common Ratios

Example Calculation

Frequently Asked Questions

Recipe Scaling Guide - How to Double, Halve, or Adjust Any Recipe

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Baker Percentage

Hydration Ratio

Bread Loaf Size