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Baker's Percentage Calculator

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Calculate baker's percentages for any bread formula. Enter flour weight as the 100% baseline and get every ingredient's percentage instantly.

IngredientWeight (g)Baker's %
Flour500 g100%
70%
2%
1%

Total Dough Weight

865 g

Total formula: 173%

What is a Baker's Percentage?

A Baker's Percentage Calculator expresses every ingredient in a bread or pastry formula as a percentage of the total flour weight, which is fixed at 100% regardless of batch size. Enter your flour weight and list every other ingredient with its weight, and the calculator instantly returns each ingredient's baker's percentage, the total dough weight, and the total formula percentage.

Baker's percentage (also called "baker's math") is the professional standard for expressing bread formulas because it makes any recipe instantly scalable to any batch size and directly comparable to any other formula, regardless of how much dough either one makes. A home baker following a recipe written in cups and a commercial bakery scaling to a 50 kg batch can both work from the exact same set of percentages.

The formula is: Baker's Percentage = (Ingredient Weight ÷ Flour Weight) × 100. Water's percentage is commonly called "hydration" and is the single most discussed variable in bread formulas, since it determines dough handling characteristics and the final crumb structure.

For scaling a finished formula to a specific batch size, or for general (non-bread) recipes, see the Recipe Scaling Calculator, which scales by servings rather than by a flour baseline.

How to use this Baker's Percentage calculator

  1. Enter your flour weight — this is your 100% baseline; if using multiple flours, enter their combined weight.
  2. Add each remaining ingredient (water, salt, yeast, fats, enrichments) with its name and weight in grams using the "+ Add Ingredient" button.
  3. Read each ingredient's baker's percentage in the results table, calculated automatically as you enter weights.
  4. Check the total dough weight and total formula percentage at the bottom to confirm your formula matches your expected batch yield.
  5. Download or share your formula breakdown as a PDF or image for your baking notes or recipe files.

Formula & Methodology

Baker's Percentage (per ingredient) = (Ingredient Weight ÷ Flour Weight) × 100

Total Dough Weight = Flour Weight + Σ (All Other Ingredient Weights)

Total Formula Percentage = 100% + Σ (All Other Ingredient Percentages)

Flour is always the fixed 100% reference, even when a formula blends multiple flour types — their combined weight forms the baseline. This convention is what makes baker's percentage so useful for scaling: multiply every percentage by any target flour weight (divided by 100) to get the exact ingredient weights for a batch of any size, without needing to know the original recipe's total yield at all.

Frequently Asked Questions

Baker's percentage expresses every ingredient in a bread or pastry formula as a percentage of the total flour weight, which is always fixed at 100% — even if there are multiple types of flour, their combined weight is the 100% baseline. Every other ingredient's percentage = (ingredient weight ÷ flour weight) × 100. This lets bakers scale a formula to any batch size and compare formulas of completely different sizes on equal footing.
Baker's percentage lets a formula scale to any batch size (100 g of flour or 100 kg) with the exact same set of percentages, without needing to recalculate ratios for each new servings count. It also makes formulas instantly comparable — a 65% hydration bread and a 75% hydration bread can be compared directly regardless of the total batch size either one was scaled to.
Hydration percentage is the water's baker's percentage — (water weight ÷ flour weight) × 100. A lean bread dough is typically 60-65% hydration, while a rustic artisan loaf or ciabatta can be 75-85% or higher. Higher hydration doughs are wetter, stickier to handle, and typically produce a more open, irregular crumb structure, like in a classic baguette or focaccia.
Multiply each ingredient's baker's percentage by your chosen flour weight, then divide by 100: Ingredient Weight = (Percentage ÷ 100) × Flour Weight. For a formula with 65% water and a 1000 g flour weight, water weight = 0.65 × 1000 = 650 g. This calculator does this in reverse — enter actual weights and it computes the corresponding percentages.
Salt is typically 1.8-2.2% of flour weight — enough to control fermentation and add flavor without inhibiting yeast activity too much. Instant dry yeast is commonly 0.5-1.5% for a same-day bake, or as low as 0.1-0.3% for a long, slow overnight fermentation. Fresh (cake) yeast is used at roughly 2-3x the instant yeast percentage.
When a formula uses more than one flour (for example, 80% bread flour and 20% whole wheat flour by weight of total flour), the combined weight of all flours together forms the 100% baseline, and every other ingredient (water, salt, yeast, fats) is calculated as a percentage of that combined total, not of each flour type separately.
Yes, though it's less universal outside of bread baking. Professional bakeries often express laminated dough (croissant, puff pastry) and even some cake and cookie formulas in baker's percentage for consistency and easy scaling, using flour as the 100% baseline in the same way as bread. Home bakers more commonly use baker's percentage specifically for yeasted bread and sourdough.
Total formula percentage is the sum of every ingredient's baker's percentage, including flour's fixed 100%. For a simple bread with 65% water, 2% salt, and 1% yeast, the total formula percentage is 100 + 65 + 2 + 1 = 168%. This number is a quick sanity check — it should roughly match the total dough weight as a percentage of the flour weight.
First determine your desired total dough weight per loaf (based on your pan size), multiply by the number of loaves to get total dough weight needed, then work backward: Flour Weight = Total Dough Weight ÷ (Total Formula Percentage ÷ 100). Enter that flour weight into this calculator along with your fixed percentages to get the exact weight of every ingredient for your batch.
Baker's percentage always uses flour as the fixed 100% reference point, which is the professional bread-baking standard. The [Recipe Scaling Calculator](/recipe-scaling-calculator/) instead scales based on a servings count, multiplying every ingredient by the same factor — useful for general recipes but less precise for bread formulas where hydration and salt percentage relative to flour are the critical variables bakers actually think in.
Weigh eggs and other liquid enrichments in grams (not by count) for accuracy, and calculate their baker's percentage the same way as any other ingredient: (ingredient weight ÷ flour weight) × 100. A typical enriched brioche dough might show butter at 40-50% and eggs at 25-35% of flour weight, substantially higher than a lean bread formula.
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