How many grams are in 1 cup of Flour?
One US cup (240 ml) of all-purpose flour weighs about 120 grams. A US customary cup (236.6 ml) holds about 118 g, a metric cup (250 ml) about 125 g, and an imperial cup (284.1 ml) about 142 g.
Cups of Flour to grams
One US cup (240 ml) of all-purpose flour weighs about 120 grams (4.2 oz), measured spoon and level.
Flour is the ingredient that started the cups-versus-grams argument. It compresses easily, so the same “1 cup” can hold anywhere from 110 g to 150 g depending on how it went into the cup — a spread big enough to turn one cookie recipe into two different cookies.
Ingredient
120 grams
US cup · all-purpose flour · spoon and level
More precise value: 120 grams
- Cup standard
- US cup · 240 ml
- Ingredient
- all-purpose flour
- Method
- spoon and level
- Density
- 0.5 g/ml
- Sources
- King Arthur · USDA FDC
- Reviewed
- 2026-08
Paste from anywhere — we convert every cup, stick and spoon we recognize and leave the rest untouched.
Converted recipe
Preferences can’t be saved in this browser — the converter still works normally.
No JavaScript? The reference tables below give the same answers.
Flour by cup standard
The same volume weighs more in a larger cup. These figures scale the reference weight of 120 g per 240 ml US cup by each cup standard’s exact volume.
| Cups | US cup | US customary cup | Metric cup | Imperial cup |
|---|---|---|---|---|
| ⅛ | 15 g | 15 g | 16 g | 18 g |
| ¼ | 30 g | 30 g | 31 g | 36 g |
| ⅓ | 40 g | 39 g | 42 g | 47 g |
| ½ | 60 g | 59 g | 63 g | 71 g |
| ⅔ | 80 g | 79 g | 83 g | 95 g |
| ¾ | 90 g | 89 g | 94 g | 107 g |
| 1 | 120 g | 118 g | 125 g | 142 g |
| 1½ | 180 g | 177 g | 188 g | 213 g |
| 2 | 240 g | 237 g | 250 g | 284 g |
all-purpose flour, spoon and level. Reviewed 2026-08.
Tablespoons and teaspoons
Spoon measures use the US definitions: 1 tablespoon = 14.79 ml (16 per cup) and 1 teaspoon = 4.93 ml (3 per tablespoon).
| Measure | Grams (g) | Ounces (oz) |
|---|---|---|
| 1 tsp | 2.5 | 0.09 |
| 1 tbsp | 7.4 | 0.26 |
| 2 tbsp | 14.8 | 0.52 |
| 4 tbsp (¼ cup) | 29.6 | 1.04 |
| 8 tbsp (½ cup) | 59.1 | 2.09 |
| 16 tbsp (1 cup) | 118.3 | 4.17 |
How to measure Flour by volume
- Fluff the flour in its bag or jar — it settles and compacts in storage.
- Spoon it loosely into the measuring cup, without shaking or tapping the cup.
- Heap it slightly, then sweep the excess off with the flat back of a knife.
- Never scoop the cup directly into the bag: that packs in 10–30 g of extra flour.
Why the weight varies
A cup of flour can weigh anywhere from about 110 g to 150 g depending on whether it is scooped, spooned or sifted. We assume the spoon-and-level method.
Too much flour is the most common reason home bakes come out dry or dense. If a recipe gives grams, trust the grams; if it only gives cups, the spoon-and-level weight of 120 g per US cup is what most modern American recipe developers assume.
Which value we publish, and why
We publish 120 g per US cup (King Arthur, spoon-and-level) because it matches the method most modern recipes assume. USDA FoodData Central lists 125 g.
Values you may see elsewhere
Sources: King Arthur · USDA FDC . Reference weight verified against King Arthur, USDA FDC. Reviewed 2026-08. Conversions are estimates — ingredient weight varies with packing and brand.
Frequently asked questions
How many grams is 1 tablespoon of Flour?
One US tablespoon (14.79 ml) of all-purpose flour weighs about 7.4 g, and one teaspoon (4.93 ml) about 2.5 g.
How many ounces is 1 cup of Flour?
One US cup of all-purpose flour weighs about 4.2 oz (120 g). Note these are weight ounces — for liquids, don’t confuse them with fluid ounces, which measure volume.
Is 1 cup of flour 120 g or 125 g?
Both figures are published by reputable sources. King Arthur Baking lists 120 g for a spooned-and-levelled cup, while USDA FoodData Central lists 125 g. We publish 120 g because it matches the method most modern recipes assume; if your recipe’s author states a different convention, use theirs.