Bread Calculator

Understanding Baker's Percentage: The Foundation of Bread Baking

Baker's percentage is the universal language of professional bakers worldwide. Unlike home recipes that list ingredients in cups or tablespoons, baker's percentage expresses every ingredient as a percentage of the total flour weight. Flour is always 100%, and everything else is relative to it. If a recipe calls for 500 grams of flour and 65% hydration, you add 325 grams of water (500 x 0.65). Salt at 2% means 10 grams (500 x 0.02). This system makes scaling recipes effortless -- whether you are baking one loaf or fifty, the ratios stay identical and the results remain consistent.

This bread calculator uses baker's percentages to compute exact ingredient weights from your flour quantity. Enter the flour weight in grams, set your desired hydration, salt, and yeast percentages, and the calculator instantly shows you precise weights for water, salt, yeast, and total dough. The results include conversions to fluid ounces for water and teaspoons for salt, making it easy to measure even without a kitchen scale.

Hydration Levels and How They Affect Your Bread

Hydration is the single most important variable in bread baking after flour quality. It determines crumb structure, crust texture, rise, and how the dough handles during shaping. Low-hydration doughs (55-60%) produce dense, tight-crumbed breads like bagels and pretzels that hold their shape well and are easy to handle. Medium hydration (60-68%) is the sweet spot for sandwich bread, dinner rolls, and enriched doughs where you want a soft but structured crumb. High hydration (70-80%) creates the open, irregular crumb prized in artisan breads like ciabatta, baguettes, and country loaves. Ultra-high hydration (80-90%) is used for focaccia and some specialty flatbreads, producing extremely open crumb with large irregular holes.

As hydration increases, the dough becomes progressively wetter and stickier, requiring different handling techniques. Low-hydration doughs can be kneaded aggressively on a floured surface, while high-hydration doughs benefit from stretch-and-fold techniques performed inside the bowl at intervals during bulk fermentation. The wetter the dough, the more important it is to develop gluten gently through time rather than force. Many bakers new to artisan bread make the mistake of adding too much flour to compensate for stickiness, which defeats the purpose of higher hydration and produces a denser loaf.

Flour Types and Their Role in Bread Quality

Not all flours behave the same at identical hydration levels. Bread flour (12-14% protein) absorbs more water than all-purpose flour (10-12% protein) and develops stronger gluten networks, making it ideal for chewy artisan loaves and sandwich breads. All-purpose flour works well for softer breads, quick breads, and when you want a more tender crumb. Whole wheat flour absorbs significantly more water than white flour -- typically 5-10% more hydration is needed because the bran particles cut through gluten strands and absorb moisture. When substituting whole wheat for white flour, increase hydration by at least 5% and expect a denser crumb.

Specialty flours add flavor and texture but require recipe adjustments. Rye flour contains less gluten-forming protein than wheat, so rye breads tend to be denser and stickier. Most rye bread recipes use a blend of rye and wheat flour (typically 30-50% rye) to maintain enough structure for a good rise. Spelt flour has a delicate gluten that over-develops easily, so spelt doughs should be mixed less and handled gently. Semolina flour adds a golden color and slightly nutty flavor and works beautifully in Italian-style breads when used at 10-30% of the total flour weight.

Fermentation: Time, Temperature, and Flavor Development

Fermentation is where bread develops its flavor, texture, and character. Yeast produces carbon dioxide gas (which makes bread rise) and ethanol, while naturally occurring bacteria in flour produce organic acids that create complex flavors. A standard straight dough with commercial yeast ferments for 1 to 2 hours at room temperature (72-78 degrees F), producing a mild-flavored bread with decent rise. Slowing fermentation by reducing yeast and/or lowering temperature dramatically improves flavor -- a cold retard in the refrigerator (38-42 degrees F) for 12 to 72 hours allows enzymatic activity and bacterial fermentation to develop nutty, tangy, wheat-forward flavors impossible to achieve in a quick rise.

The amount of yeast directly controls fermentation speed. Standard recipes use 1-2% instant yeast (baker's percentage) for a 1-2 hour bulk fermentation. Reducing yeast to 0.3-0.5% and fermenting overnight at room temperature (or 0.1-0.2% for a 24-hour cold ferment) produces far more complex flavor. Many professional bakeries use very small amounts of yeast -- sometimes as little as 0.1% -- combined with long cold fermentation to maximize flavor extraction from the flour.

Sourdough vs. Commercial Yeast: Key Differences

Sourdough uses a naturally fermented starter (a mix of flour, water, and wild yeast plus lactobacilli bacteria) instead of commercial yeast. A mature sourdough starter is typically used at 15-30% of flour weight. Sourdough fermentation is slower than commercial yeast -- bulk fermentation takes 4 to 8 hours at room temperature, or 12 to 18 hours in the refrigerator. The lactic and acetic acids produced by the bacteria give sourdough its distinctive tangy flavor, improve shelf life by lowering pH (which retards mold growth), and may make the bread easier to digest by partially breaking down gluten and phytic acid.

If you are converting a yeasted recipe to sourdough, replace the commercial yeast with 20% of the flour weight in active starter (at 100% hydration). Because the starter contributes both flour and water, you need to subtract those amounts from your recipe totals. For example, using 100g of 100% hydration starter means subtracting 50g from your flour and 50g from your water. Sourdough doughs often benefit from slightly higher hydration than their yeasted counterparts because the acids in the starter tighten the gluten, making the dough feel stiffer than its actual hydration level.

Salt: More Than Just Flavor

Salt serves multiple critical functions in bread beyond taste. It strengthens gluten by tightening protein bonds, which improves dough structure and helps the loaf hold its shape. It regulates yeast activity, preventing the dough from fermenting too quickly and producing off-flavors. It also affects crust color -- salt promotes Maillard browning, which is why salt-free bread tends to look pale. The standard range is 1.8-2.2% of flour weight, with 2% being the most common choice. Reducing salt below 1.5% produces noticeably bland bread with weaker structure, while exceeding 2.5% can inhibit yeast too much and produce an overly salty taste.

Troubleshooting Common Bread Problems

Dense, heavy bread usually results from one of three issues: under-kneading (insufficient gluten development), under-proofing (not enough fermentation time for adequate gas production), or using flour with too little protein. If your bread is dense, try kneading longer or using the windowpane test -- stretch a small piece of dough thin enough to see light through it without tearing. If it tears easily, keep kneading. Over-proofing produces a different problem: the loaf rises well but then collapses in the oven because the gluten network has stretched past its limit and can no longer hold gas. A properly proofed loaf springs back slowly when poked with a finger, leaving a slight indentation.

Gummy or wet interior is common with high-hydration breads that are pulled from the oven too soon. Internal temperature should reach 200-210 degrees F (93-99 degrees C) for lean breads. Use an instant-read thermometer inserted into the center of the loaf. Another frequent issue is poor oven spring (the loaf does not expand well in the first 10 minutes of baking). This is typically caused by insufficient steam in the oven -- place a cast iron pan of boiling water on the bottom rack, or bake in a preheated Dutch oven with the lid on for the first 20 minutes to trap steam, which keeps the crust flexible long enough for the loaf to expand fully.