Baker's Percentage Calculator
The professional framework for scaling and understanding any bread recipe.
Baker's percentage is the framework professional bakers use to describe recipes. Every ingredient is expressed as a percentage of the flour weight, which is always 100%. A typical baguette recipe in baker's percentages: 100% flour, 68% water, 2% salt, 0.5% instant yeast.
This framework makes recipes instantly scalable (want to make 2 kg of dough? Everything scales from flour times 2) and comparable (two recipes can be evaluated side-by-side by percentages rather than absolute weights). This calculator converts any bread recipe into baker's percentages, and back.
Enter your flour, water, salt, yeast, and other ingredient amounts; get the percentage breakdown. Or enter percentages and a target flour amount to calculate absolute weights. Once you read recipes in baker's percentages, you will see the commonalities between seemingly different breads.
Breakdown
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Example Recipes in Baker's Percentages
Read across: every recipe, the same framework.
| Bread | Flour | Water | Salt | Yeast |
|---|---|---|---|---|
| Baguette | 100% | 68% | 2% | 0.3% instant |
| Sandwich bread | 100% | 60% | 2% | 1% (+5% sugar, +3% butter) |
| Pizza Napoletana | 100% | 62% | 2.5% | 0.2% |
| Ciabatta | 100% | 80% | 2% | 0.3% |
| Brioche | 100% | 15% water | 2% | 1.5% (+30% sugar, +50% butter, +eggs) |
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The Reference
Baker's percentage is a ratio framework, not absolute math. Each ingredient is expressed relative to flour (100%). Total percentage always exceeds 100% (often 170-250%). This looks odd at first but is standard in professional baking.
To scale a recipe: pick your target flour weight, multiply every percentage by that weight, divide by 100. Example: 500 g flour times 68% water = 340 g water. The framework scales linearly for ingredients but not always for fermentation time.
Why Percentages Beat Fixed Recipes
Baker's percentage is a formulation framework developed over generations of professional baking. Every ingredient is expressed as a percentage of the flour weight (which is always 100%). A ciabatta recipe might be 100% flour, 80% water, 2% salt, 0.3% instant yeast. That formula works at any scale: 500 g flour or 50 kg flour.
Percentages enable direct recipe comparison. A baguette at 68% hydration and a ciabatta at 80% hydration can be compared as formulas even though their ingredient lists and quantities differ completely. The percentages reveal the underlying structure.
Percentages also make recipe scaling trivial. Multiply your target flour weight by each percentage (in decimal form). 2 kg flour times 0.68 equals 1360 g water. Times 0.02 equals 40 g salt. Every ingredient calculation is a single multiplication. This is why commercial bakeries work exclusively in percentages and weights, not volume measurements.
How to Use
- Choose the direction. Recipe to percentages, or percentages to recipe.
- Enter your ingredients (grams) or percentages with target flour weight.
- Get the converted recipe with each ingredient in both forms.
Frequently Asked Questions
Why does professional baking use percentages instead of absolute weights?
Scalability and comparison. Professional bakers work in huge quantities (50 kg flour at a time) and small home tests (500 g). A recipe in percentages works identically at any scale. Comparing recipes is also easier.
What is the ideal salt percentage?
1.8-2.2% of flour weight. Below 1.5% tastes bland; above 2.5% inhibits yeast activity and dries the bread. Salt interacts with gluten and flavor development. The 2% target is a sweet spot refined over centuries.
How do I calculate percentages with pre-ferments?
Include all flour (including pre-ferment flour) in the 100% base. Add pre-ferment water to total water. A 50 g pre-ferment at 100% hydration contains 25 g flour plus 25 g water. All of which count toward your recipe totals.
Can I use baker's percentages for pastry and enriched doughs?
Yes. The framework works for brioche, croissant, cookie dough, cake, and most baked goods. Enriched doughs just have higher percentages of butter, eggs, and sugar (often adding up to 200-250% total).
Is there software for baker's percentages?
Many commercial bakeries use dedicated formulation software. For home use, this calculator plus a spreadsheet is sufficient. The King Arthur Baking website has a similar calculator with additional features.
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