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White bread calories per 100g: 266 kcal
USDA U.S. reference per 100g
Bread calories: the package label beats a standard slice
USDA lists commercially prepared white bread at about 266 calories per 100 grams and commercially prepared whole-wheat bread at about 252 calories per 100 grams. Those values are references, not a promise that every loaf or slice has the same composition.
How to log a U.S. serving
In U.S. grocery stores, thin-sliced, standard, Texas toast, bakery, sourdough, rye, and gluten-free loaves can have very different slice weights. When the package is available, use its serving size and number of slices rather than assigning one universal value to “a slice.”
When to use another entry
For toast and sandwiches, record butter, avocado, nut butter, cheese, deli meat, and spreads separately. The bread entry should describe the loaf, while the completed meal includes every topping and filling.
Frequently asked questions
How many calories are in white bread per 100g?
The cited USDA entry lists commercially prepared white bread at about 266 calories per 100 grams.
How many calories are in one slice of bread?
Check the package label and actual slice weight because loaf recipes and slice sizes vary.
Can I use the white-bread value for sourdough or gluten-free bread?
No. Use a label or source that matches the specific type of bread.
Sources, U.S. scope, and fact check
Reference items: USDA FoodData Central lists commercially prepared white bread (FDC ID 174924) at about 266 kcal per 100g and commercially prepared whole-wheat bread (FDC ID 172688) at about 252 kcal per 100g. These are not universal values for rye, sourdough, gluten-free, or specialty breads.
- USDA FoodData Central — Commercially prepared white bread
- USDA FoodData Central — Commercial whole-wheat bread
Applicable region: U.S. food-composition reference data. Last fact check: July 24, 2026. Use the product label when a brand and slice weight are known.
Editorial information
Written and edited by
Editor-in-Chief at CalMind. Leads editorial direction and English-language nutrition content.
Editorial disclosure added July 17, 2026. This page is not labeled as professionally reviewed unless a named reviewer and verifiable credential are shown.