1 Cup Buckwheat Flour in Grams
1 cup of buckwheat flour weighs 120 g (spooned and levelled, USDA). Earthy, gluten-free flour ground from buckwheat groats. All the figures on this page are approximate conversions based on the USDA value, so when a recipe really matters, verify with a kitchen scale.
Buckwheat flour is earthy, dark and naturally gluten-free, and despite its name it has nothing to do with wheat: it is ground from the seeds of a plant related to rhubarb. It is the flour of Breton galettes, Russian blinis, Japanese soba noodles and the pancakes of the American frontier, and its flavour is strong enough to stand on its own. A cup weighs 120 g, the same as all-purpose flour, which makes conversion straightforward, but its behaviour is not: with no gluten, buckwheat batters and doughs need a rest and a gentle hand, and they are usually blended with wheat flour when structure matters.
Cups lie: why buckwheat flour should be weighed
Flour is the ingredient where cup measurements fail most often, and the reason is packing. The same cup of flour can weigh anywhere from 120 g to 142 g depending on whether you scoop it straight from the bag or spoon it in lightly, and that 20 g swing is the difference between a tender cake and a dry one. In bread the error is more forgiving, because dough can be adjusted by feel, but in cakes, pastry and cookies there is no second chance once the batter is mixed. Weighing flour is the single highest-value habit a home baker can adopt, and it costs nothing more than a basic kitchen scale. It also makes recipes repeatable: the same numbers give the same loaf, the same crumb and the same rise every time you bake it.
Worked examples
Buckwheat pancakes for breakfast
A batch of buckwheat pancakes that calls for 2 cups of buckwheat flour needs 240 g, whisked with milk, egg and a little baking powder. The batter should rest for ten minutes before cooking, because buckwheat flour absorbs liquid slowly and the rest lets it hydrate fully. The pancakes bake up dark, speckled and deeply flavoured, and they are best with maple syrup and butter, which balance the earthiness of the flour.
Blinis for a celebration
Blinis are small, yeasted buckwheat pancakes, and a batch that uses 1 cup of buckwheat flour needs 120 g, mixed with milk, yeast and a little wheat flour for structure. The batter is left to rise until bubbly, then spooned onto a hot pan in small rounds. Served warm with smoked salmon and sour cream, blinis are one of the oldest uses of buckwheat flour, and the weight of the flour is what keeps the batter the right thickness.
Soba noodles from scratch
Soba noodles are traditionally made from buckwheat flour and water, and a batch that calls for 3 cups of flour needs 360 g. The dough is kneaded briefly, rolled thin and cut into fine strands, and because there is no gluten, the dough is fragile and must be handled gently. Most home recipes add a little wheat flour for strength, which makes the noodles easier to roll without changing the flavour much.
Buckwheat Flour cups to grams conversion table
| Cups | Grams | Tablespoons |
|---|---|---|
| 1/4 cup | 30 g | 4 |
| 1/3 cup | 40 g | 5.3 |
| 1/2 cup | 60 g | 8 |
| 2/3 cup | 80 g | 10.7 |
| 3/4 cup | 90 g | 12 |
| 1 cup | 120 g | 16 |
| 1 1/2 cups | 180 g | 24 |
| 2 cups | 240 g | 32 |
| 3 cups | 360 g | 48 |
| 4 cups | 480 g | 64 |
One tablespoon of buckwheat flour weighs about 7.5 g, and a cup is 16 tablespoons, so the tablespoon column is simply the cup weight divided by 16. For small amounts, a scale that reads to the gram is far more reliable than a spoon, because a heaped tablespoon can weigh half as much again as a level one. All the values in this table are approximate, and they assume the ingredient is measured spooned and levelled, exactly as the source measured it.
How the weight was measured
spooned and levelled means filling the cup with a spoon rather than plunging the cup into the bag or jar, then sweeping a straight knife across the top to level it off. Never scoop, and never tap the cup down, because both pack the ingredient and add weight. The difference between a spooned cup and a scooped cup can be 15 to 25 percent, which is enough to change a bake from tender to tough, so the method matters as much as the number. The source for the figure on this page is USDA, and the confidence in the value is medium. USDA publishes a standard ingredient weight chart that recipe developers use as a reference, and this page follows that chart rather than any single cookbook. Where the chart gives a range or a note, we say so plainly instead of hiding the uncertainty. All the figures here are approximate conversions: natural ingredients vary by brand, variety, moisture and how finely they are chopped or ground, so when a recipe really matters, verify the weight with a kitchen scale.
When this conversion matters most
This conversion matters most in baking, where flour provides the structure of the finished product. Cakes, pastry, cookies and enriched breads all depend on the ratio of flour to liquid, fat and sugar, and a 10 percent error in flour throws that ratio off. It matters less in recipes where flour is a thickener or a coating, such as a roux or a dusting for fried food, because small differences disappear into the cooking. It matters again when you scale a recipe up or down: doubling a scooped cup doubles the error, while doubling a weighed amount stays exact. If you bake the same recipe more than once, weighing is what makes the second batch taste like the first.
Common mistakes
The most common mistake is scooping the cup directly through the bag. That packs the flour down and can add 20 g or more per cup, which is enough to turn a soft dough stiff or a moist cake dry. The second mistake is using a liquid measuring jug for flour. Jugs are read at eye level and cannot be levelled with a knife, so the amount is a guess dressed up as a measurement. The third is tapping or shaking the cup to settle the flour, which packs it further. And the fourth is forgetting that different flours weigh different amounts per cup: a cup of one flour is not interchangeable with a cup of another, even when the recipe says one cup of either. Always convert by weight for the flour you are actually using.
What to do if you do not have a scale
If you do not have a scale, spoon the flour into the cup until it is heaped, then sweep a straight knife across the top to level it off. Never scoop, never tap, and never press the flour down. That spooned-and-levelled method is exactly how the figure on this page was measured, so it is the closest you can get without weighing. It will still vary by a few grams from cup to cup, because flour settles and humidity changes its weight, but it is far closer than scooping. For recipes where flour is the main structure, such as sponge cakes and pastry, a scale that reads to the gram is worth buying before any other piece of baking equipment.
Storing buckwheat flour
Airtight container in the fridge; high oil content shortens shelf life. Keeping buckwheat flour properly stored matters for the conversion as well as for the flavour: an ingredient that has absorbed moisture from the air weighs more per cup than a dry one, and one that has dried out weighs less. Store it in an airtight container, away from heat and light, and measure it in the state the recipe expects, not straight from a damp or stale bag.
Frequently asked questions
Is buckwheat related to wheat?
No. Buckwheat is not a grain at all; it is the seed of a flowering plant related to rhubarb and sorrel, and it contains no gluten. The name comes from the shape of the seed, which resembles a beechnut, not from any relationship to wheat. That is why buckwheat flour is naturally gluten-free and why it behaves so differently from wheat flour in baking, even though a cup of each weighs the same 120 g.
Why are my buckwheat pancakes dense?
Buckwheat flour has no gluten, so buckwheat batters do not trap gas the way wheat batters do, and the pancakes are naturally denser. A short rest before cooking helps, because it lets the flour hydrate fully, and a little extra baking powder gives lift. Blending in a quarter of wheat flour by weight also helps, but if you need the pancakes to stay gluten-free, accept a denser, more flavourful pancake and cook them a little thinner.
Can I use cups instead of a scale for buckwheat flour?
Yes, but a scale is more accurate. If you measure buckwheat flour spooned and levelled, exactly as the figure on this page was measured, a cup will be close to 120 g, within a few grams. The problem is that most people scoop rather than spoon, which can add 15 to 25 percent to the weight, and that error is enough to change a bake. For everyday cooking, cups are fine. For baking, where the ratio of ingredients decides the result, weigh it and check the number on the scale.
How many tablespoons are in a cup of buckwheat flour?
There are 16 tablespoons in a US cup, so a cup of buckwheat flour is 16 tablespoons, and one tablespoon weighs about 7.5 g. A teaspoon weighs about 2.5 g. Tablespoons are useful when a recipe calls for a small amount, but they carry the same packing problem as cups: a heaped tablespoon can weigh half as much again as a level one, so level every spoon with the back of a knife, and use a scale for small amounts when accuracy matters.
Does the weight change if I pack or sift buckwheat flour?
Yes, and this is the single biggest source of error in cup measurements. buckwheat flour is measured spooned and levelled, and a scooped cup can weigh 15 to 25 percent more than a spooned cup, because scooping packs the ingredient down. Sifting has the opposite effect: it adds air and makes the cup lighter. Always measure the way the figure on this page was measured, spooned and levelled, and the weight will match the table.