How do I calculate 70% hydration?
For 300 g flour, 300 × 70% = 210 g water.
Kitchen
Dough Hydration Calculator
Enter flour, water, and additional water to check current dough hydration and how much water is needed for the target.
Updated: May 15, 2026
Input
Calculate dough hydration from flour and water, then estimate water needed for a target hydration.
This simple version excludes eggs, milk, fats, tangzhong, and ingredient moisture. Flour type and absorption change dough feel.
Result
65%
Current hydration
15g to add
Water to target
210g
Target total water
195g
Current total water
-5%
Hydration difference
Use this as a guide and adjust for your real conditions.
Share this tool
How to use
- Enter flour and water in grams.
- Enter additional water and target hydration.
- Current hydration and water to target appear on the right.
Useful tips
- Useful when you want to find water for 70% hydration; adjust inputs to compare outcomes.
- Useful when you want to check hydration after adding water; adjust inputs to compare outcomes.
- Prefer product labels, recipe notes, and equipment markings when available.
- When unsure, start with a smaller or shorter estimate and adjust from the actual result.
Formula
Hydration (%) = total water grams ÷ flour grams × 100. Target total water = flour grams × target hydration ÷ 100.
Notes
- This simple version excludes eggs, milk, fats, tangzhong, and ingredient moisture.
- Flour type, room temperature, absorption, and mixing change dough feel.
- Higher hydration can be harder to handle, so adjust by the actual dough state.
Related tools
See more mini tools- Microwave Wattage Converter Kitchen Convert heating times between 500W, 600W, 700W, and other microwave settings.
- Tablespoon, Teaspoon, ml Converter Kitchen Quickly convert between tablespoons, teaspoons, ml, and rough grams.
- Recipe Serving Converter Kitchen Scale a recipe from 2 servings to 3, 4, or any target serving count.
- Kitchen Timer Kitchen A simple timer you can use right away while cooking.
FAQ
Does it include eggs or milk?
No. This simple version does not convert those automatically. If needed, convert the water portion yourself and enter it as water.
TooToTools
Use more kitchen mini tools
Check measures, serving conversions, timers, and ingredient weight estimates in your browser.