A bread flour protein content chart maps each brand to its protein percentage, which determines gluten potential and water absorption. For most bread, aim for 11.5-13% protein — King Arthur Bread Flour (12.7%) is the common benchmark. Go higher (13-14.5%) for bagels and pizza, slightly lower (10.5-11.5%) for baguettes. Always adjust hydration by dough feel when you switch flours, because higher protein absorbs more water.
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Open ToolProtein content is the single most important number on a bag of flour, and most bakers never look at it. That percentage — usually printed in tiny type on the nutrition panel — determines how much gluten your dough can form, how much water your flour will absorb, and ultimately what kind of bread you can make with it.
This article gives you the chart, then explains what those numbers actually mean in practice.
Understanding Protein Content in Flour
Wheat flour protein ranges from about 7% (cake flour) to 15% (high-gluten bread flour). The proteins that matter for bread baking are glutenin and gliadin — the two protein classes that hydrate and cross-link to form gluten.
Glutenin provides elasticity (the tendency to spring back). Gliadin provides extensibility (the ability to stretch without tearing). Bread flour is selected for an appropriate balance of both.
Higher protein flour absorbs more water. Jeffrey Hamelman explains that a flour at 11.5% protein mixed at 68% hydration produces a particular consistency — but substituting a 12.5% protein flour at the same 68% produces a noticeably stiffer dough. The hydration must increase to compensate.
The rule: When switching flours, always adjust hydration based on the feel of the dough, not the recipe number.
The Protein Content Chart
Flour Protein Content: The Complete Chart
Representative brands by category, lowest to highest protein
Protein % determines gluten potential, water absorption, and dough behavior.
All-Purpose Flour (9.5-12%)
| Brand | Protein % | Notes |
|---|---|---|
| Gold Medal All-Purpose | 10.5% | Bleached and unbleached versions |
| Pillsbury All-Purpose | 10-11% | Widely available |
| King Arthur All-Purpose | 11.7% | Notably higher than other AP flours |
| Bob’s Red Mill All-Purpose | 10-11% | Unbleached |
| Heckers / Ceresota All-Purpose | 11.5-12% | Northeast US regional; high for AP |
| White Lily All-Purpose | 9-9.5% | Southern US; soft winter wheat — very low for AP |
| Trader Joe’s All-Purpose | 10-11% | Unbleached |
| Store Brand All-Purpose (typical) | 10-11% | Varies by region and source wheat |
King Arthur All-Purpose at 11.7% is closer to many other brands’ bread flour than their all-purpose. White Lily at 9-9.5% is basically pastry flour by protein content. These differences matter enormously if you are following a recipe written for a specific brand.
Bread Flour (11.5-13.5%)
| Brand | Protein % | Notes |
|---|---|---|
| King Arthur Bread Flour | 12.7% | The benchmark for home bread bakers |
| Gold Medal Better for Bread | 12% | Widely available |
| Pillsbury Bread Flour | 12% | Standard bread flour |
| Bob’s Red Mill Artisan Bread Flour | 12.5-13% | Unbleached, malted |
| Central Milling Organic Artisan Bread | 11.5-12% | Professional quality, lower protein |
| Giusto’s Baker’s Choice | 11.5-12% | West Coast artisan standard |
| Cairnspring Mills Sequoia | 11-12% | PNW regional, fresh-milled character |
| Great River Organic Bread Flour | 13-14% | Very high protein |
For the full tested-and-ranked breakdown of these, see our guide to the best bread flour for homemade bread.
High-Gluten Flour (13-15%)
| Brand | Protein % | Notes |
|---|---|---|
| King Arthur Sir Lancelot | 14.2% | Bagels, pizza, high-gluten applications |
| Pendleton Power | 14% | Professional bakery flour |
| General Mills All Trumps | 14.2% | Iconic pizza flour |
| Full Strength (ConAgra) | 13.8% | Professional high-gluten |
High-gluten flour is designed for applications that need maximum structure — bagels, pizza that needs to hold up to heavy toppings, and high-protein breads with very high hydration where the extra gluten compensates for the weakening effect of excess water.
Whole Wheat Flour (13-14%)
| Brand | Protein % | Notes |
|---|---|---|
| King Arthur Whole Wheat | 14% | Fine grind |
| Bob’s Red Mill Whole Wheat | 13-14% | Stone-ground option available |
| Gold Medal Whole Wheat | 13% | Widely available |
| Arrowhead Mills Whole Wheat | 14-15% | Organic, stone-ground |
| Central Milling Whole Wheat | 13% | Professional quality |
Whole wheat flour has high protein but that number is misleading. The bran in whole wheat punctures gluten strands, weakening the network despite the higher protein percentage. A 14% protein whole wheat flour produces weaker gluten than a 12.7% protein white bread flour. This is why whole wheat bread requires adjusted technique — higher hydration, more gentle mixing, and often a longer autolyse.
Specialty and Type Flours
| Flour Type | Typical Protein % | Best Use |
|---|---|---|
| Italian 00 (Caputo Tipo 00) | 11.5-12.5% | Pizza, pasta — finely milled, moderate protein |
| French T55 | 10-11% | Baguettes — lower protein for extensibility |
| French T65 | 11-12% | Pain de campagne, rustic bread |
| French T80 | 11-12% | Semi-whole, higher ash content |
| Semolina (durum) | 12-13% | NOT suitable for bread — wrong gluten quality |
| Cake flour | 7-8% | Never for bread |
| Pastry flour | 8-9% | Never for bread |
The Six Wheat Classes
The protein content of any flour starts with the wheat it was milled from. Jeffrey Hamelman identifies six classes of wheat grown in the United States:
- Hard Red Spring (11-15% protein) — Grown in fierce-winter states like North Dakota. This is the highest-protein wheat class and the backbone of most bread flours.
- Hard Red Winter (10-13% protein) — Grown in gentle-winter states like Kansas. Moderate protein, versatile.
- Hard White Winter (10-13% protein) — Similar protein to hard red but lighter color. Produces a milder-flavored flour.
- Durum (12-15% protein) — Highest total protein, but the gluten quality is wrong for bread. Durum gluten cannot retain gas properly and risks dough breakdown during mixing. Used for pasta and couscous.
- Soft White Winter (8-10% protein) — Low protein. Used for pastry flour, cake flour. Not for bread.
- Soft White Spring (8-10% protein) — Low protein. Same applications as soft white winter.
For bread baking, you want flour from the first three classes. Spring wheat at 11-12% protein average is preferred by many professional bakers for hearth bread flavor and performance.
American vs. French Flour
American flour holds more water than French flour at the same protein number. Ken Forkish explains the difference clearly: “American wheat flour holds more water and has a different quality of gluten-forming proteins than that used by French and Italian bakers. A wet dough in France would probably contain about 5 percent less water than an American high-hydration dough.”
So when a French recipe calls for 70% hydration with French T55 flour, and you use American bread flour at 12.7% protein, you may need to increase hydration to 72-75% to get a similar dough consistency. The protein is higher and absorbs more water, but the flour also behaves differently during fermentation.
European type numbers (T55, T65, Type 550, etc.) indicate ash content — the mineral content remaining after incineration — NOT protein content. Higher ash numbers mean more of the outer endosperm, bran, and mineral-rich layers are retained. This is a different measurement system from American protein percentages.
How to Read the Nutrition Label
The protein percentage listed on a nutrition label is per serving, not per 100g. To convert:
- Find the protein grams per serving
- Find the serving size in grams
- Divide protein by serving size, multiply by 100
Example: a flour that lists 4g protein per 30g serving works out to (4 / 30) x 100 = 13.3% on the panel. But note the panel rounds to the nearest gram, so it is a coarse estimate — a flour whose true milling spec is 12.7% can still round to 4g per 30g on the label. When precision matters, use the miller’s published technical spec rather than the nutrition panel.
Some brands list the protein percentage directly on their website or packaging. When comparing flours, make sure you are comparing the same measurement.
Damaged Starch: The Hidden Variable
Protein content is not the whole picture. During milling, some starch granules are physically damaged. Damaged starch absorbs water excessively during mixing but releases it during baking — leading to slack dough, flattened loaves, and poor oven spring.
US starch damage levels average 8-9%, while European levels average around 7%. This is another reason American and European flours behave differently even at similar protein levels.
Symptoms of high starch damage include: sticky bulk fermentation, weak dough that spreads flat, excess crust color, and soft rather than crisp crust.
Choosing the Right Flour for Your Bread
| Bread Style | Ideal Protein Range | Why |
|---|---|---|
| Sandwich bread | 11-12% | Moderate gluten for soft, even crumb |
| Country/sourdough boule | 11.5-12.5% | Balanced structure and extensibility |
| Baguette | 10.5-11.5% | Lower protein for open crumb, thin crust |
| Bagels | 13-14.5% | Maximum gluten for dense, chewy texture |
| High-hydration ciabatta | 12-13% | Extra protein compensates for excess water |
| Whole wheat bread | 13-14% (WW) | Bran damage requires higher starting protein |
| Brioche | 11.5-12.5% | Moderate — fat weakens gluten, so balance matters |
When your usual flour runs out, our bread flour substitutes guide covers what to swap in and how to adjust.
The Bottom Line
Protein content is not just a number — it is the blueprint for your dough’s structure. A 2% difference in protein content can mean the difference between a slack, spreading loaf and a tight, well-risen one. Know your flour, adjust your hydration accordingly, and pay attention to how the dough feels, not just what the recipe says.
Start by finding the protein percentage of the flour you use most. Then, when you try a new brand or type, you will know exactly what adjustments to make.
Frequently Asked Questions
- What is a good protein percentage for bread flour?
- For most bread baking, you want flour with 11.5-13% protein. This range provides enough gluten-forming proteins for a strong, well-risen loaf with good structure. King Arthur Bread Flour at 12.7% is a widely used benchmark. For bagels and high-gluten applications, go higher (13-14.5%). For baguettes and breads that need extensibility, slightly lower (10.5-11.5%) works better.
- Does higher protein flour always make better bread?
- No. Higher protein means more gluten potential, but more gluten is not always desirable. Baguettes benefit from moderate protein (10.5-11.5%) because too much gluten makes the crumb tight and chewy rather than open and airy. Durum wheat has the highest protein of any wheat class (12-15%) but is unsuitable for bread — its gluten quality cannot retain gas properly.
- Why does my bread turn out differently with a new flour brand?
- Different brands source from different wheat classes with different protein levels. King Arthur All-Purpose at 11.7% protein behaves very differently from White Lily All-Purpose at 9-9.5%. Higher protein flour also absorbs more water, so switching from a 10.5% to a 12.5% protein flour at the same hydration produces a noticeably stiffer dough. Always adjust hydration based on dough feel when changing flours.
- Is whole wheat flour higher in protein than bread flour?
- Whole wheat flour often has a higher protein percentage (13-14%) than white bread flour, but this number is misleading. The bran in whole wheat physically punctures gluten strands, weakening the network despite the higher protein count. A 14% protein whole wheat flour actually produces weaker gluten than a 12.7% protein white bread flour.
- What is the difference between American and European flour types?
- American flour is classified by protein content. European flour uses type numbers (T55, T65, Type 550) that indicate ash content — the mineral residue after incineration — not protein. American wheat also holds more water and has different gluten characteristics. A recipe using French T55 flour at 70% hydration may need 72-75% hydration when made with American bread flour.
