Why professional bakers think in percentages, not cups
Baker's percentage (also called "baker's math") expresses every ingredient as a percentage of the total flour weight, with flour always fixed at 100% regardless of the actual recipe size. This makes recipes instantly scalable to any batch size — a 65% hydration bread dough is 65% hydration whether you're making one loaf or fifty, since the ratio between flour and water stays constant no matter how much flour you start with. It also makes recipes easy to compare: a baker can glance at "65% hydration, 2% salt, 1% yeast" and immediately understand the dough's character, without needing to know the batch size at all.
What these specific percentages mean for your dough
Water percentage (hydration) is the single biggest factor in dough character — lower hydration (around 60%) gives a firmer, easier-to-shape dough good for sandwich bread; higher hydration (75%+) gives an open, irregular crumb typical of artisan and ciabatta-style breads, but is stickier and harder to handle. Salt at 2% is a common standard — enough for flavor and to help control fermentation without overwhelming the yeast. Yeast percentage varies more by desired rise speed — 1% is a moderate, overnight-friendly rate; recipes wanting a fast same-day rise often use more.
FAQ
Can I add more ingredients to this percentage system? Yes — the same logic extends to any ingredient (oil, sugar, eggs): just express it as a percentage of the flour weight and multiply the same way.
Does baker's percentage account for multiple flours in one recipe? When a recipe uses more than one flour (e.g. bread flour plus rye), the percentages are usually based on the combined total flour weight, with each flour type also expressed as its own percentage of that total.