Bread Hydration Calculator
Calculate dough hydration percentage from flour and water weights for bread baking. Enter values for instant results with step-by-step formulas.
Formula
Hydration % = (Total Water / Total Flour) x 100
Total water includes water from the recipe plus water contributed by the starter. Total flour includes recipe flour plus flour from the starter. For a starter at H% hydration: starter flour = starter weight / (1 + H/100), starter water = remainder.
Worked Examples
Example 1: Classic Sourdough Loaf
Problem: Calculate hydration for: 500g bread flour, 350g water, 100g starter at 100% hydration, 10g salt.
Solution: Starter flour: 100 / (1 + 100/100) = 50g\nStarter water: 100 - 50 = 50g\nTotal flour: 500 + 50 = 550g\nTotal water: 350 + 50 = 400g\nHydration: (400/550) x 100 = 72.7%\nSalt: (10/550) x 100 = 1.8%\nTotal dough: 550 + 400 + 10 = 960g
Result: Hydration: 72.7% | Dough type: Moderate (artisan loaf) | Total: 960g
Example 2: High Hydration Ciabatta
Problem: Calculate hydration for: 400g bread flour, 340g water, 80g starter at 100% hydration, 8g salt.
Solution: Starter flour: 80 / 2 = 40g\nStarter water: 80 - 40 = 40g\nTotal flour: 400 + 40 = 440g\nTotal water: 340 + 40 = 380g\nHydration: (380/440) x 100 = 86.4%\nSalt: (8/440) x 100 = 1.8%\nTotal dough: 440 + 380 + 8 = 828g
Result: Hydration: 86.4% | Dough type: Very High (expert level) | Total: 828g
Frequently Asked Questions
What is dough hydration and why does it matter?
Dough hydration is the ratio of total water weight to total flour weight in a bread recipe, expressed as a percentage. It is arguably the single most important factor determining the texture, crumb structure, and handling characteristics of your bread. Higher hydration produces a more open, airy crumb with larger holes, which is why artisan breads like ciabatta use 80 percent or more hydration. Lower hydration creates a tighter, more uniform crumb suitable for sandwich bread. Hydration also affects the crust, with wetter doughs producing thinner, crispier crusts. Understanding hydration gives you the ability to predict how a dough will behave before you even mix it.
How do I calculate hydration when using a sourdough starter?
A sourdough starter contributes both flour and water to the dough, and these must be accounted for in the hydration calculation. For a 100 percent hydration starter, half the weight is flour and half is water. For a 50 percent hydration starter, two-thirds is flour and one-third is water. The formula is: starter flour = starter weight divided by (1 + hydration/100), and starter water equals the remainder. Add these to the recipe flour and water respectively. For example, 100 grams of 100 percent hydration starter adds 50 grams flour and 50 grams water. Bread Hydration Calculator handles this math automatically so you can see the true hydration of your final dough.
What hydration should I use for different bread types?
Different bread styles call for different hydration levels. Bagels and pretzels work best at 50 to 55 percent, producing a dense, chewy texture. Sandwich bread and dinner rolls need 58 to 65 percent for a soft, sliceable crumb. Classic sourdough and artisan loaves target 65 to 75 percent for a balance of open crumb and workability. Ciabatta and focaccia require 75 to 85 percent for their signature large, irregular holes. Pizza dough varies from 55 percent for New York style to 70 percent or more for Neapolitan. Baguettes traditionally use 65 to 68 percent. Starting with a proven hydration for your bread type prevents frustration and produces reliable results.
Why is higher hydration dough harder to work with?
Higher hydration dough is stickier and more extensible, making it challenging to shape and handle, especially for beginners. The excess water creates a slack dough that spreads rather than holding its shape. Traditional kneading techniques do not work well because the dough sticks to everything. Instead, high hydration doughs require different techniques like stretch and fold, coil folds, and slap and fold, which develop gluten without the mess of traditional kneading. Wet hands and a bench scraper become essential tools. The payoff is worth the learning curve since high hydration bread has superior oven spring, a more open crumb, and better flavor development compared to dryer doughs.
What is the ideal salt percentage in bread?
Most bread recipes use salt at 1.8 to 2.2 percent of total flour weight, with 2 percent being the widely accepted standard. Salt plays multiple critical roles beyond flavor. It tightens the gluten network, giving dough more strength and elasticity. It controls fermentation speed by inhibiting yeast and bacterial activity, preventing the dough from over-proofing. It also helps the crust brown through its effect on the Maillard reaction. Reducing salt below 1.5 percent produces noticeably bland bread with a weaker structure that is prone to over-proofing. Going above 2.5 percent can significantly slow fermentation and produce an unpleasantly salty taste that overpowers the wheat and fermentation flavors.
How does flour type affect hydration needs?
Different flours absorb water at significantly different rates, which directly impacts the hydration you should target. Bread flour with high protein content around 12 to 14 percent absorbs more water than all-purpose flour at 10 to 12 percent protein. Whole wheat flour absorbs considerably more water because the bran particles cut gluten strands and soak up moisture, so increase hydration by 5 to 10 percent compared to white flour recipes. Rye flour is extremely absorbent and also lacks gluten, so rye bread requires different handling entirely. Freshly milled flour absorbs more water than aged commercial flour. When substituting flour types, always adjust the water gradually rather than adding it all at once.