A typical serving of brownie (1 square, large, 56 g) has about 227 calories. Per 100 g: 405 kcal, 4.8 g protein, 63.9 g carbs, 16.3 g fat. The same 100 g carries 2.1 g of fiber and 36.6 g of sugar. Most of the energy comes from carbohydrate.
| Serving | Weight | Calories |
|---|---|---|
| 1 square, large | 56 g | 227 kcal |
| 1 package, Little Debbie | 61 g | 247 kcal |
| 1 oz | 28 g | 115 kcal |
| 100 g | 100 g | 405 kcal |
A bakery square runs about 230 calories; pan corners are rarely standard. On the energy-density scale, 405 kcal per 100 g puts brownie at the very high end.

A typical serving (1 square, large, 56 g) has about 227 calories, and 100 g has 405 kcal. Calories scale with weight, so double the portion means double the number.
There are 4.8 g of protein in 100 g of brownie, which works out to about 2.7 g per serving (1 square). Treat it as an energy source rather than a protein source.
Sugar comes to 36.6 g per 100 g, so 1 square (56 g) delivers roughly 20 g. That sugar is already counted inside the calorie figures on this page.
Every value on this page comes from USDA FoodData Central, entry 172713 (SR Legacy). Serving figures are converted from the per-100-g data, so rounding can shift a total by a calorie or two.
Snap a photo of your plate in Joules and the calories and macros for brownie are logged for you.
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 172713 (SR Legacy). Serving calories are computed from the per-100-g values.