Sourdough Hydration Calculator
Practical Guide
Last updated: 2026-05-11Overview
Calculate the total hydration percentage of your dough. Understanding hydration is the key to controlling crumb structure and crust texture in artisanal breads.
When to Use This Tool
- •Formula development for sourdough or complex breads
- •Adjusting for environmental factors like altitude and humidity
- •Professional bakery production planning
How to Use
- 1Enter your base formula parameters
- 2Adjust environmental and ingredient variables
- 3Analyze the resulting hydration and fermentation curves
Methodology
The calculator totals all water sources (including water in your starter) and divides by the total flour weight to find the baker's percentage for hydration.
Baking Scenarios (Examples)
Standard Scenario
Small Batch / Lower Range
Large Batch / Higher Range
Assumptions & Variability
Based on modern dough rheology standards
Assumes active, healthy fermentation cultures
Temperature values assume steady-state environments
Common Pitfalls
Ignoring water temperature (Final Dough Temperature)
Underestimating the effect of salt on fermentation speed
Not accounting for flour's natural absorption capacity
Over-hydrating dough for the specific flour type used
Relying solely on time rather than dough appearance/feel
Quick Reference Reference Chart
| Flour Weight | Water Weight | Starter Weight | Starter Hydration | Total Hydration | Total Flour | Total Water |
|---|---|---|---|---|---|---|
| 50 | 350 | 100 | 100 | 400 | 100 | 400 |
| 295 | 350 | 100 | 100 | 115.9 | 345 | 400 |
| 540 | 350 | 100 | 100 | 67.8 | 590 | 400 |
| 785 | 350 | 100 | 100 | 47.9 | 835 | 400 |
| 1030 | 350 | 100 | 100 | 37 | 1080 | 400 |
| 1275 | 350 | 100 | 100 | 30.2 | 1325 | 400 |
| 1520 | 350 | 100 | 100 | 25.5 | 1570 | 400 |
| 1765 | 350 | 100 | 100 | 22 | 1815 | 400 |
| 2010 | 350 | 100 | 100 | 19.4 | 2060 | 400 |
| 2255 | 350 | 100 | 100 | 17.4 | 2305 | 400 |
Frequently Asked Questions
How accurate is the projected rise time?
It is an estimate based on your inputs; activity levels of yeast/starter always vary.
Does humidity affect the hydration calculation?
Yes, flour absorbs moisture from the air. High humidity usually means you need less added water.
Can I use this for non-yeasted doughs?
Many principles apply, but these specific calculators focus on fermented dough structures.
Issue with this calculator?
If you found a calculation error, or have a suggestion for a new feature or calculator, let us know! We update our tools weekly.