how many grams in a cup of buckwheat flour?

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things people ask

• Why does my buckwheat flour cup measurement vary so much?
  Buckwheat flour is coarser and more variable than wheat flour — light grinds run closer to 110 g per cup, while darker, hull-flecked grinds hit 125-130 g. The 120 g figure assumes a medium grind, spooned and leveled. If your bag looks gray-brown with visible specks, expect the heavier end. Weighing avoids the guesswork entirely.
• Can I swap buckwheat flour cup-for-cup with all-purpose?
  Not in most baked goods. Buckwheat has no gluten, so a full 120 g swap into a cake or bread gives you something dense and crumbly. The common move is replacing 25-50% of the wheat flour by weight — that keeps structure while adding the malty, slightly bitter flavor buckwheat is known for. For naturally gluten-free recipes like blini or galettes, 100% buckwheat is the standard.
• Does sifting buckwheat flour change the cup weight?
  Yes, more than with wheat flour. Buckwheat clumps as it sits, especially if your kitchen is humid, so a sifted cup runs 105-110 g instead of 120 g. Recipes for crepes and Japanese soba often specify sifted flour for a smoother batter — weigh after sifting if the recipe is precise about hydration.

related conversions

• Buckwheat Flour: tablespoons to grams
• Buckwheat Flour: teaspoons to grams
• Buckwheat Flour guide