Baker's Percentage Calculator

Baker's percentage (also called baker's math) is a notation system where every ingredient in a recipe is expressed as a percentage of the total flour weight. Flour is always set at 100%, and all other ingredients are calculated relative to it. This makes it easy to scale recipes up or down and compare formulas across different batch sizes.

The formula is: Baker's Percentage = (Ingredient Weight ÷ Total Flour Weight) × 100. For example, if you use 335 g of water with 500 g of flour, the water's baker's percentage is (335 ÷ 500) × 100 = 67%. This 67% is also known as the dough hydration.

Flour is the foundational ingredient in virtually every baked good, so it serves as the baseline reference for all other percentages. Setting flour at 100% makes the ratio system consistent — no matter how large or small your batch, every ingredient's percentage stays the same as long as your formula ratios remain constant.

A hydration of 67% means the water in your dough weighs 67% as much as your total flour. Higher hydration doughs (above 75%) are wetter and produce open, airy crumbs typical of ciabatta or sourdough. Lower hydration doughs (below 60%) are stiffer and better suited for bagels or firm sandwich loaves.

Once you know each ingredient's baker's percentage, multiply each percentage by your new flour weight to get the scaled ingredient weight. For instance, if salt is 2% and you want to use 800 g of flour, you need 0.02 × 800 = 16 g of salt. This calculator does the scaling automatically — just enter your flour weight and ingredient amounts.

Most bread recipes use between 1.8% and 2.2% salt (baker's percentage). Salt strengthens gluten, controls fermentation speed, and enhances flavor. Going below 1.5% can make bread taste flat, while exceeding 2.5% can inhibit yeast activity significantly.

Professional bakers use baker's percentages to communicate recipes clearly, ensure consistency across large batches, and quickly adjust formulas for different yields. It also makes it easy to spot imbalances in a recipe at a glance — for example, if the yeast percentage seems too high or the fat content too low for the style of bread being made.

Yes — baker's math applies to any recipe where flour is the primary dry ingredient, including cakes, cookies, pastry doughs, muffins, and pancakes. The flour weight still serves as the 100% baseline, making it equally useful for fine-tuning the ratio of sugar, fat, eggs, or liquid in virtually any baked good.