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Dough Hydration Calculator

Dough hydration percentage, and the water to add for a target hydration.

Enter values

Results update as you type.

Result

Hydration

72.73 %

Total flour
550 g
Total water
400 g
Flour from the starter
50 g
Dough type
Artisan / open crumb
Total dough weight
950 g

About the Dough Hydration Calculator

Dough hydration percentage, and the water to add for a target hydration.

Also known as: bread hydration calculator, hydration percentage, water to flour ratio, sourdough hydration.

How to use this calculator

  1. Enter calculate, flour, starter weight, starter hydration and the other fields.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

hydration % = total water ÷ total flour × 100

Worked example

Using the values pre-filled in the calculator above:

  • Calculate: Hydration from weights
  • Flour = 500 g
  • Water = 350 g
  • Starter weight = 100 g
  • Starter hydration = 100 %

the calculator returns:

  • Hydration: 72.73 %
  • Total flour: 550 g
  • Total water: 400 g
  • Flour from the starter: 50 g