A typical serving of flour (1 cup, 125 g) has about 455 calories. Per 100 g: 364 kcal, 10.3 g protein, 76.3 g carbs, 1 g fat. The same 100 g carries 2.7 g of fiber and 0.3 g of sugar. Most of the energy comes from carbohydrate.
| Serving | Weight | Calories |
|---|---|---|
| 1 cup | 125 g | 455 kcal |
| 100 g | 100 g | 364 kcal |
Useful for recipe math: one cup of flour carries about 455 calories into whatever you bake. On the energy-density scale, 364 kcal per 100 g puts flour at the high end.

A typical serving (1 cup, 125 g) has about 455 calories, and 100 g has 364 kcal. Calories scale with weight, so double the portion means double the number.
There are 10.3 g of protein in 100 g of flour, which works out to about 12.9 g per serving (1 cup). It contributes meaningful protein, though most of the calories come from elsewhere.
There are 76.3 g of carbohydrate per 100 g of flour, or about 95 g in 1 cup (125 g).
Every value on this page comes from USDA FoodData Central, entry 168894 (SR Legacy). Serving figures are converted from the per-100-g data, so rounding can shift a total by a calorie or two.
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Get JoulesA note on accuracy: calculators like this one provide estimates based on population-level formulas — your real needs vary with genetics, muscle mass, medical conditions, and more. Results are for information only and are not medical advice, a diagnosis, or a prescription. Talk to a doctor or registered dietitian before making significant changes to your diet or exercise, especially if you have a health condition, are pregnant, or are under 18.
Nutrition data: USDA FoodData Central, FDC ID 168894 (SR Legacy). Serving calories are computed from the per-100-g values.