Foundational

Baker's Percentage & Ratios

How baker's percentage works, why flour is always 100%, how to read a percentage at a glance, why some ingredients exceed 100%, and the scaling math that makes every recipe resize cleanly.

Questions

• What is baker's percentage?

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  Baker's percentage expresses every ingredient as a percentage of the total flour weight. Flour is always 100%, so a recipe with 65% water and 2% salt uses 65g of water and 2g of salt for every 100g of flour. It is the standard way professional bakeries write recipes, because it makes a formula scalable to any size and easy to compare against another.

• Why is flour always 100% in baker's percentage?

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  Flour is the structural backbone of bread, so it makes the natural reference point that every other ingredient is measured against. Setting it to 100% means a single glance tells you how wet, salty, or enriched a dough is relative to its flour. If a recipe uses more than one flour, their weights are added together to make the 100% — so a loaf that is 80% bread flour and 20% rye still totals 100% flour.

• How do I read a baker's percentage at a glance?

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  Read the number as grams of that ingredient per 100g of flour. So 2% salt means 2g of salt per 100g of flour, and 75% water means 75g of water per 100g of flour. Once you are used to it, the percentages alone tell you the character of a dough before you weigh anything — roughly 2% salt and 65% water reads as a standard lean loaf.

• Why do some ingredients show more than 100%?

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  A percentage above 100% just means there is more of that ingredient than there is flour — which is normal and not a mistake. Only flour is pinned to 100%; everything else floats relative to it. Rich doughs and dessert batters routinely cross that line: a brownie can run sugar around 250% and butter around 130% of the flour weight, because they carry far more sugar and fat than flour.

• How does baker's percentage make a recipe scalable?

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  Because every ingredient is tied to the flour weight, you only ever change one number — the flour — and the percentages do the rest. Double the flour and every other amount doubles automatically; halve it and they halve. That is exactly what the calculator does behind the scenes when you ask for a different number of loaves or a different total dough weight.

• Is hydration the same thing as a percentage?

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  Hydration is one specific baker's percentage: the water weight as a percentage of the flour weight. A dough at 70% hydration has 70g of water per 100g of flour. It is the percentage bakers talk about most because it drives so much of the crumb and handling, but salt, yeast, fat, and sugar are all expressed the same way.

• Why does baker's percentage need weights instead of cups?

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  The whole system depends on a consistent reference, and volume measures are not consistent. A cup of flour can vary by 20% or more depending on how it is scooped and settled, which is enough to turn a 65% dough into a dry or soupy one. Weighing in grams is what makes a percentage mean the same thing every time, which is why every recipe here is written by weight.