A typical serving of whole-wheat bread (1 slice, 32 g) has about 81 calories. Per 100 g: 252 kcal, 12.4 g protein, 42.7 g carbs, 3.5 g fat. The same 100 g carries 6 g of fiber and 4.3 g of sugar. Most of the energy comes from carbohydrate.
| Serving | Weight | Calories |
|---|---|---|
| 1 slice | 32 g | 81 kcal |
| 1 oz | 28 g | 72 kcal |
| 100 g | 100 g | 252 kcal |
Almost the same calories as white bread per slice; the gain is fiber, not lightness. On the energy-density scale, 252 kcal per 100 g puts whole-wheat bread at the high end. Fiber is the standout at 6 g per 100 g, which slows a portion down more than the calorie count suggests.
A typical serving (1 slice, 32 g) has about 81 calories, and 100 g has 252 kcal. Calories scale with weight, so double the portion means double the number.
There are 12.4 g of protein in 100 g of whole-wheat bread, which works out to about 4 g per serving (1 slice). It contributes meaningful protein, though most of the calories come from elsewhere.
There are 42.7 g of carbohydrate per 100 g of whole-wheat bread, or about 14 g in 1 slice (32 g).
Every value on this page comes from USDA FoodData Central, entry 172688 (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 172688 (SR Legacy). Serving calories are computed from the per-100-g values.
