Baker’s Percentage Explained with a Complete Worked Formula

Build the flour reference first

Add all the flour in the formula before calculating percentages. For a simple dough with 400 g white flour and 100 g whole-grain flour, the reference is 500 g total flour. Water at 325 g is 325 ÷ 500 × 100 = 65%. Salt at 10 g is 2%.

The percentages do not need to total 100. They describe relationships to flour, not shares of the finished dough. In the example, flour, water and salt already total 167% before any yeast or other ingredients. This is the most common point of confusion when moving from ordinary percentages to baker’s math.

Scale the complete formula

Suppose an illustrative lean-dough formula uses flour 100%, water 65%, salt 2% and yeast 1%. At 500 g flour, those quantities are 500 g, 325 g, 10 g and 5 g, for 840 g total dough. This is a calculation example, not a tested recipe or fermentation schedule.

To make 1,260 g of that same formula, multiply every quantity by 1.5. Alternatively divide target dough by 1.68 to get 750 g flour, then calculate the other ingredients from it. Scaling only the flour would change the formula rather than enlarge the batch.

Recognize what the math does not decide

Ingredient proportions do not determine mixing time, fermentation readiness, bake time or pan capacity on their own. Flour type, temperature, dough handling and equipment still matter. Use a complete, reliable recipe for the practical method, then use baker’s percentages to understand its structure.

When a formula includes a starter or preferment, include its flour and water in the totals. Our starter worksheet explains that calculation separately. Do not count the starter once as an ingredient and again as extra flour without reconciling the totals; that would misstate both batch weight and hydration.

Work backward from a dough target

Use a hypothetical formula with flour 100%, water 70%, salt 2% and dry yeast 0.5%. The total is 172.5%, or a multiplier of 1.725. To target 1,035 g of dough, divide 1,035 by 1.725. That gives 600 g flour. The other quantities are 420 g water, 12 g salt and 3 g yeast. Add them: 600 + 420 + 12 + 3 = 1,035 g.

Now separate the mathematical result from the practical bake. The calculation says nothing about whether that dough fits your pan, whether the yeast quantity matches a particular fermentation plan or whether your flour suits the hydration. Those questions belong to a complete recipe and method.

When recording your own formula, use two columns: baker’s percentage and actual grams. A third column can describe the ingredient precisely, such as flour type or yeast type. This prevents a later baker from assuming that every product with the same broad name behaves identically. Keep the total percentage visible so you can reconstruct the batch calculation. If the sum of the ingredient weights does not match the expected total, check the arithmetic before changing the recipe.

Questions that come up