What is Dough Hydration?
Dough Hydration
Dough hydration is the percentage of water relative to flour in your recipe, calculated by dividing the weight of water by the weight of flour and multiplying by 100. It's the single number that tells you whether your dough will be stiff and tight or slack and extensible — and it directly affects your labor time, yield, crumb structure, and profit margin on every loaf you bake.
Formula
Hydration % = (Weight of Water ÷ Weight of Flour) × 100
Worked Example:
Bread flour: 500g
Whole wheat flour: 100g
Total flour: 600g
Water: 420g
Hydration = (420 ÷ 600) × 100 = 70%Example
You're developing a sourdough formula to sell at farmers market. You want a loaf that opens beautifully, holds moisture for 3 days, but doesn't require more than 45 minutes of hands-on labor per batch. Recipe (makes 4 loaves, 850g each): - Bread flour: 1,400g @ $0.42/kg = $0.588 - Whole wheat flour: 200g @ $0.68/kg = $0.136 - Water: 1,200g @ $0.00/kg = $0.00 - Sea salt: 32g @ $8.50/kg = $0.272 - Sourdough starter (100% hydration): 400g @ $0.42/kg flour cost = $0.168 Total flour weight: 1,600g (1,400g bread flour + 200g whole wheat flour) Total water weight: 1,200g water + 400g starter (which is 50% water, so 200g water) = 1,400g total water Hydration = (1,400 ÷ 1,600) × 100 = 87.5% This is a high hydration. Your dough will be slack and require stretch-and-fold every 30 minutes for 2 hours during bulk fermentation. You'll need a banneton basket or floured bowl for final proof because the dough won't hold its shape on a flat surface. But your crumb will be open and irregular — exactly what sells at farmers market. Your ingredient cost per loaf: ($0.588 + $0.136 + $0.00 + $0.272 + $0.168) ÷ 4 = $0.291 per loaf. If you sell each loaf for $7.50, your food cost is 3.9% — excellent. But you're spending 50 minutes of labor per batch (4 loaves). If you dropped to 75% hydration (1,200g water instead of 1,400g), you'd cut bulk fermentation to 90 minutes and skip the stretch-and-fold work. You'd save 15 minutes per batch. Over a week of 3 batches, that's 45 minutes of labor — $13.50 at $18/hour. But your crumb would be tighter, and you might lose the visual appeal that justifies the $7.50 price. The decision: stick with 87.5% hydration because your market segment values open crumb and will pay for it. But know the cost of that choice in labor time.
Understanding Dough Hydration
Here's why this matters to your bottom line: a 65% hydration dough (like a classic French bread) takes longer to develop gluten, demands more bench time, and yields a tighter crumb. A 75% hydration dough (like a ciabatta or sourdough) develops faster, requires less kneading, but demands more skill to handle without degassing. The difference in water content changes your ingredient cost per loaf by less than $0.10, but it changes your labor time per batch by 15–25 minutes. That's real money. Let's use a real example: a 1kg sourdough loaf. You're mixing 650g bread flour, 50g whole wheat flour, and 500g water. Your total flour weight is 700g. Your hydration is (500 ÷ 700) × 100 = 71.4%. This is a moderately high hydration — your dough will be sticky to handle, require careful lamination or stretch-and-fold technique, but will open up in the oven and give you those irregular, desirable holes in the crumb. If you reduced the water to 455g, you'd have a 65% hydration dough — stiffer, easier to score and shape, but with a tighter, more uniform crumb and slightly lower yield. Hydration affects your portion cost directly. That 71.4% hydration loaf uses 500g of water at essentially $0 per kilo. But it demands 35 minutes of bulk fermentation, 20 minutes of bench rest, and 15 minutes of shaping and final proof — labor you're paying for whether you track it or not. A 65% hydration version cuts your bench time to 12 minutes because the dough is stiffer and easier to handle. Over 40 loaves a day, that's 280 minutes (4.7 hours) of labor you save. At $18/hour, that's $84.60 per day, or $422 per week. That's why hydration isn't just a formula — it's a business decision. Different products demand different hydrations. A brioche is 60–65% (rich, dense, buttery). A ciabatta is 80–85% (open, irregular, requires skill). A sandwich loaf is 58–62% (tight, uniform, easy to slice). A focaccia is 75–80% (oily, soft, forgiving). You choose hydration based on the product you're selling, the labor you have available, and the shelf life you need. Higher hydration loaves stale faster because water evaporates more quickly from an open crumb.
How BakeOnyx Helps
BakeOnyx calculates your dough hydration automatically when you enter a recipe's flour and water weights. Change your flour blend (swap 50g bread flour for rye) and the hydration recalculates instantly. You see how swapping suppliers or adjusting your formula changes both the hydration percentage and your ingredient cost per loaf — so you can test formulas without guessing. Scale a recipe from 4 loaves to 12 loaves and hydration stays the same; ingredient weights and costs scale proportionally.
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