how many grams in a cup of vital wheat gluten?

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things people ask

• How much vital wheat gluten in one cup?
  144 g, spooned into the cup and leveled, per King Arthur's weight chart. Vital wheat gluten is fine and slightly clumpy, so scooping straight from the bag can pack in 10-15 g extra. For a seitan recipe scaled around 1 cup of gluten, that drift changes the protein-to-water ratio enough to push the texture from tender to rubbery.
• Why does seitan dough need such a precise gluten-to-water ratio?
  Vital wheat gluten is 75-80% pure protein, so it absorbs water aggressively. The standard 1 cup gluten (144 g) to 3/4 cup water gives a hydration around 75%, which kneads up springy but still tender. Drop below 2/3 cup water and the dough turns dense and squeaky; push past 1 cup water and it slackens into something closer to a batter that won't hold a roast shape.
• Can I add a cup of gluten to bread flour to boost protein?
  Not a full cup — that's a seitan-level dose. For bread, vital wheat gluten works at 1-2 tablespoons per cup of low-protein flour. A whole cup added to a loaf would push protein well past 20% and give you a tough, chewy crumb closer to a bagel-bagel hybrid than sandwich bread. Keep cup-scale measurements for seitan, not loaf-scale baking.

related conversions

• Vital Wheat Gluten: tablespoons to grams
• Vital Wheat Gluten: teaspoons to grams
• Vital Wheat Gluten guide