DIY Cost Tools
Dough Hydration Calculator
COOKING CALCULATOR
Calculate dough hydration and the water mass needed for a chosen target.
Use the units shown. All fields are required; absolute values cannot exceed one trillion. Include flour and water contributed by a starter in their respective totals. Milk, eggs, fruit, fats, and other ingredients are not decomposed into water here. A negative adjustment is a planning difference, not a way to remove water from mixed dough.
How to use this calculator
Replace the defaults with your measured ingredient quantities or chosen recipe assumptions. Select Calculate and read the units beside each result. Weigh ingredients when volume measurement or packing would introduce uncertainty.
Formula and explanation
Hydration % = total water ÷ total flour × 100; target water = flour × target hydration/100
Baker's hydration expresses water mass relative to flour mass. A negative adjustment means the current mix has more water than the target for the entered flour quantity.
Worked example
For Total flour mass (grams) = 500, Total water mass (grams) = 350, Target hydration (%) = 70, the results are Current hydration (%): 70; Water at target hydration (grams): 350; Target water minus current water (grams): 0.
Important limitations
Include flour and water contributed by a starter in their respective totals. Milk, eggs, fruit, fats, and other ingredients are not decomposed into water here. A negative adjustment is a planning difference, not a way to remove water from mixed dough.
These tools calculate quantities from your assumptions; they do not establish food safety, nutrition, or recipe quality. Follow appropriate recipe and product instructions.
Frequently asked questions
Should I include sourdough starter?
Include its flour and water separately in the totals when their composition is known.
Does hydration determine dough texture by itself?
No. Flour type, mixing, fermentation, temperature, and other ingredients also matter.
Can I mix measurement units?
Convert to the units beside each input first. Grams measure mass; milliliters and cups measure volume.
What happens with invalid inputs?
The previous result clears and a validation instruction appears, preventing an old result from being mistaken for a new calculation.
Review notes
Reviewed October 1, 2026. Default examples were independently checked against the displayed formulas and conversion factors. Script checks covered blank, negative, nonfinite, and excessive values. Calculations run in your browser.