Aisha K.
Mar 12, 2026
Clean layout and the results update instantly. Exactly what I needed for a quick planning check.
Unit Converters
Sourdough Hydration Percentage Converter
hydration % = (water grams ÷ flour grams) × 100. Baker’s percent.
Hydration is water ÷ flour × 100. Starter is extra flour and water if you include it. 70% on bread flour handles easily; 80% wants a wet-hand technique. Whole grain drinks more than the percentage admits.
Water (grams)
g water → %
70 %
Include starter flour and water if you want the true dough percent.
- Water
- 350 g
- Flour
- 500 g
Plain-English guide
Terms & how it works
Confused by a field? Read the short definitions here while you use the tool.
Water (grams)
The “Water (grams)” value used in this tool’s formula. Adjust it to see results update live.
Flour (grams)
The “Flour (grams)” value used in this tool’s formula. Adjust it to see results update live.
How this calculator works
Hydration is water ÷ flour × 100. Starter is extra flour and water if you include it. 70% on bread flour handles easily; 80% wants a wet-hand technique. Whole grain drinks more than the percentage admits. hydration % = (water grams ÷ flour grams) × 100. Baker’s percent. Example: 350 g water + 500 g flour → 70%. 400 g water → 80%.
hydration % = (water grams ÷ flour grams) × 100. Baker’s percent.
Example: 350 g water + 500 g flour → 70%. 400 g water → 80%.
When to use this Sourdough Hydration
Common use cases
- Hydration is water ÷ flour × 100. Starter is extra flour and water if you include it. 70% on bread flour handles easily; 80% wants a wet-hand technique. Whole grain drinks more than the percentage admits.
- Sanity-check with this case: 350 g water + 500 g flour → 70%. 400 g water → 80%.
- The relationship is: hydration % = (water grams ÷ flour grams) × 100. Baker’s percent.
Localized examples
- Unit Converters: the example on this page uses the same formula as the widget.
What you get
- Fields: Water (grams), Flour (grams)
- hydration % = (water grams ÷ flour grams) × 100. Baker’s percent.
- Example on the page: 350 g water + 500 g flour → 70%. 400 g water → 80%.
How to Convert Sourdough Hydration Step-by-Step
- 1Enter Water (grams), Flour (grams). Use the values you have, not a catalog average, unless that is all you know.
- 2hydration % = (water grams ÷ flour grams) × 100. Baker’s percent.
- 3Worked case: 350 g water + 500 g flour → 70%. 400 g water → 80%.
- 4Check which dictionary the other person is using — US or UK, decimal or 1,024 — then trust the number.
Governing formula
hydration % = (water grams ÷ flour grams) × 100. Baker’s percent.
350 g water + 500 g flour → 70%. 400 g water → 80%.
Example: set Water (grams) = 350, Flour (grams) = 500, then read the result.
Variable definitions
- value
Water (grams)
The “Water (grams)” field. Default 350; typical range 1–4000.
- flour
Flour (grams)
The “Flour (grams)” field. Default 500; typical range 1–5000.
- The conversion (hydration % = (water grams ÷ flour grams) × 100. Baker’s percent.) does not pick US vs UK gallons, SI vs binary megabytes, or Mach at altitude for you. Read the footnote on the page.
- Nothing here is uploaded for the calculation itself.
Frequently Asked Questions
Add its flour to flour and its water to water, or the percent is a fanfic.
Related calculators
Unit Converters
- Acres to HectaresUS farm ads in acres, EU paperwork in hectares. Divide acres by 2.471. Ten acres is 4.05 ha. A 160-acre quarter-section is 64.7 ha.
- Acres to Square FeetUS land: one acre is 43,560 ft², a chain-and-furlong leftover that refused to die. A quarter-acre lot is 10,890 ft². Multiply acres by 43,560. Soccer-field metaphors are not a survey.
- Appliance Running CostCost = watts × hours / 1000 × $/kWh. A 1,500 W space heater for 4 hours at $0.16/kWh is $0.96. The supply rate on the bill is the one that matters, not a national average.
- Arabic to Roman Numerals1–3999 using standard subtractive notation. 4 is IV, 9 is IX, 1999 is MCMXCIX. Super Bowl branding that writes Super Bowl 1 as I is the same system until they run out of Ms.
- ASCII / Unicode Code PointsType a character, a decimal code, 0x41, or U+1F600. You get the code point, hex, binary, and UTF-8 bytes. ASCII is 0–127. Everything else is Unicode. This is not an encoding converter for files — it is one scalar value at a time.
- Aspect RatioHeight = width × (ratio height / ratio width). 1920×1080 is 16:9. Instagram’s 1:1 is a crop, not a camera sensor. Letterboxing is you refusing to crop.
Get a note when we add a planner
Occasional email when something new is worth opening. We never share your address. Unsubscribe anytime.
Discover & search
Explore More Tools
Related tools in Unit Converters — strengthening topical internal links.
Same category · 3 tools
Browse all →Meters to Kilometers
Unit Converters
A 5K is 5,000 meters, not 5 kilometers on the nose if your watch is sloppy. Divide meters by 1,000. Track races, building plans, and “how far was that hike” all live in this split.
Feet to Meters
Unit Converters
US height, ceiling height, and lumber still arrive in feet. Meter plans do not. One foot is exactly 0.3048 m — not “about a third.” Use this when a listing says 10 ft ceilings and the architect works in meters.
Inches to Centimeters
Unit Converters
Monitor diagonals, waist measurements, and photo prints still come in inches. Clothing charts in Europe come in cm. Multiply inches by 2.54. That factor is exact, not a kitchen guess.
Community
Reviews & Ratings
See what others think about this tool, then leave your own rating to help improve CalculioHub.
4.8
out of 5.0
4 reviews
Daniel R.
Feb 28, 2026
Very usable on mobile. Would love a save/export option later, but the math feels solid.
Priya S.
Feb 3, 2026
The FAQ section answered my questions before I even had to search. Smooth dark mode too.
Marcus L.
Jan 19, 2026
Simple inputs, clear outputs. This replaced three bookmarks I used to juggle.
Improve this tool
Suggestion Box
Share an idea, report a bug, or send general feedback for Sourdough Hydration. Your input helps shape what we build next.