Spelt Sourdough Hydration: How Much Water Does Spelt Need?
Spelt is an ancient relative of modern wheat with a softer, more extensible gluten. Most bakers use less water and gentler handling than for a wheat bread flour loaf.
How spelt differs from bread flour
Spelt (Triticum spelta) is a species of wheat. It contains gluten, so it isn't suitable for people with coeliac disease. Its gluten is typically more stretchy (extensible) and less elastic than modern bread wheat. A spelt dough stretches easily but tears and slackens sooner, and it doesn't hold its shape as firmly. That's why many spelt recipes use lower hydration, fewer folds and a shorter bulk fermentation than wheat recipes.
Starting hydration
| Flour | Common starting hydration |
|---|---|
| White (light/sifted) spelt | about 62–70% |
| Wholegrain (wholemeal) spelt | about 65–75% |
| 50/50 spelt and wheat bread flour | about 68–75% |
For comparison, many white bread flour sourdoughs sit around 68–75%, and wholemeal wheat goes higher (see whole wheat hydration). Spelt flours vary a lot by mill and harvest, so start low. Add water only if the dough still feels stiff after a 30-minute rest.
Names in the US, UK and Australia
- US: spelt flour (often whole grain) and white or light spelt flour.
- UK: wholemeal spelt flour and white spelt flour.
- Australia: wholemeal spelt flour and white or light spelt flour.
German recipes call spelt Dinkel.
Worked example: wholegrain spelt loaf
In the calculator enter total dough 900 g, water 68%, starter 15%, starter hydration 100%, salt 2%:
| Ingredient | Grams | Ounces |
|---|---|---|
| Spelt flour | 486 g | 17.16 oz |
| Water | 331 g | 11.67 oz |
| Starter (100%) | 73 g | 2.57 oz |
| Salt | 10 g | 0.34 oz |
True hydration with the starter counted is 70.2%. Grams are rounded as the calculator shows them (unrounded salt is 9.7 g); ounces are converted from the unrounded figures.
Handling tips
- Mix gently and briefly. Spelt gluten can break down if over-mixed. A couple of sets of gentle folds is often enough.
- Watch fermentation closely. Many bakers find spelt doughs ferment and relax faster, so shape a little earlier than you would a wheat dough.
- Use a basket or tin. A banneton or loaf tin helps a softer dough keep its shape. See the banneton size guide or loaf pan dough weights.
- Cold proof. A spell in the fridge firms the dough for easier scoring.
Enter your spelt hydration and starter in the calculator to get exact weights and the true hydration with your starter counted.
Open the free calculatorFAQ
Does spelt need more or less water than bread flour?
Usually less. Spelt's gluten is more extensible and less elastic, so many bakers start around 62–70% for white spelt and 65–75% for wholegrain spelt, then adjust.
Is spelt gluten-free?
No. Spelt is a type of wheat and contains gluten, so it isn't suitable for people with coeliac disease.
Why is my spelt sourdough flat?
Common causes are too much water, over-mixing, and letting the dough over-ferment. Try a few points less water, gentler folds, earlier shaping, and a basket or tin.
Can I mix spelt with regular bread flour?
Yes. A 50/50 blend is popular and is easier to handle than 100% spelt. Start around 68–75% hydration.