Baker’s percentage calculator
Express any ingredient as a percentage of total flour weight, including flour in preferments.
How to use the result
Ingredient weight ÷ total flour weight × 100. Add every flour together first, including flour in starter or preferments. Flour is always 100%; the formula total usually exceeds 100%.
Worked example
350 g water ÷ 500 g flour × 100 = 70%.
Before changing the recipe
Use the same weight unit for both entries. This calculation describes a formula; it does not recommend salt, yeast, or water levels. A 70% water figure is an example, not a universal target.
Reference: King Arthur Baking: baker’s percentage · Accessed October 6, 2026.
Calculation tool · Editorial review pending