Hydration Calculator
Hydration is water weight as a percentage of flour weight — the single number that most determines how wet, sticky, and open-crumbed your dough will be.
What’s my hydration?
Hydration: 75%
How much water for a target hydration?
Water needed: 375 g
Frequently asked questions
- What does hydration percent mean in bread baking?
- It's the weight of water as a percentage of the weight of flour (water ÷ flour × 100). 500g flour with 375g water is 75% hydration. Higher numbers mean a wetter, stickier dough.
- Does hydration include the water in my starter?
- This simple calculator doesn't — it's just the flour and water you're measuring right now. For a full recipe that accounts for your starter's own flour and water, use the recipe scaler instead.