A typical serving of chocolate cake (1 slice, 64 g) has about 249 calories. Per 100 g: 389 kcal, 3.5 g protein, 52.8 g carbs, 20 g fat. The same 100 g carries 2.2 g of fiber and 40 g of sugar. The energy comes from a mix of carbs, fat, and protein.
| Serving | Weight | Calories |
|---|---|---|
| 1 slice | 64 g | 249 kcal |
| 1 large slice | 138 g | 537 kcal |
| 100 g | 100 g | 389 kcal |
With frosting, a modest slice is about 250 calories; celebration slices are not modest. On the energy-density scale, 389 kcal per 100 g puts chocolate cake at the high end.
A typical serving (1 slice, 64 g) has about 249 calories, and 100 g has 389 kcal. Calories scale with weight, so double the portion means double the number.
There are 3.5 g of protein in 100 g of chocolate cake, which works out to about 2.2 g per serving (1 slice). Treat it as an energy source rather than a protein source.
Sugar comes to 40 g per 100 g, so 1 slice (64 g) delivers roughly 26 g. That sugar is already counted inside the calorie figures on this page.
Every value on this page comes from USDA FoodData Central, entry 174934 (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 174934 (SR Legacy). Serving calories are computed from the per-100-g values.
