Sourdough Hydration Calculator โ€“ Calculate Water Amount

Calculate the right amount of water for your sourdough. With recommendations by flour type.

What is this?

Hydration = water amount as a percentage of flour weight. 70% hydration means: 700g water for 1000g flour.[1] [2]

Why important: Hydration affects dough consistency, fermentations speed, gluten development, crumb openness and crust thickness โ€” higher hydration generally yields a more open crumb and thinner crust, but requires different handling and stronger gluten management.[1] [2]

Calculator

Water amount (g) --
Dough weight approx. (g) --

incl. 2% salt

Recommendations by Flour Type

Flour Min % Standard % Max %
Bread flour 65% 68% 72%
High-gluten flour 68% 72% 75%
Medium rye flour 70% 74% 78%
Spelt flour 60% 64% 68%
Whole wheat flour 75% 78% 85%

Hydration Ranges

under 65% easy

Stiff dough, easy to shape, denser crumb

65-72% easy

Standard, good balance of workability and results

72-80% medium

Wet dough, open crumb, harder to handle

over 80% hard

Very wet, for advanced bakers, ciabatta-like

Tips

๐Ÿ’ก Don't forget water in the starter

Recipe hydration refers to TOTAL water amount, including the water in your starter โ€” if your starter is 100% hydration and you use 100 g of starter, that contributes ~50 g water and 50 g flour to the totals, which changes the final hydration calculation.[2] [1]

๐Ÿ’ก Weigh ingredients precisely

Weigh all ingredients on a kitchen scale โ€” small measurement errors matter more at high hydration. Adjust by 1โ€“2% and watch dough feel rather than relying solely on numbers.[1]

๐Ÿ’ก Adjust for flour absorption

Different flours and brands absorb differently; when increasing hydration, hydrate gradually during mixing (autolyse or stepwise additions) and use a dough scraper to manage sticky dough.[1] [2]

๐Ÿ’ก Temperature and environment

Warmer dough ferments faster; higher ambient humidity and warmer room temperatures can make a wetter dough feel slack โ€” control dough temperature as needed and consider a proofing box for consistency.[1]

๐Ÿ’ก Shaping and proofing aids

For wetter doughs use a well-floured proofing basket or a cloth-lined bowl and consider a Dutch oven or cast iron pot for baking to help with steam and oven spring.[1] [2]

Sources

  1. [1]
    The Perfect Loaf โ€“ The Perfect Loaf โ€“ Link
  2. [2]
    Plรถtzblog โ€“ Plรถtzblog โ€“ Link