白面包热量与蛋白质（每100克）White bread: calories & protein per 100 g
数据Data: USDA FoodData Central #174924 (SR Legacy) — “Bread, white, commercially prepared (includes soft bread crumbs)”. 图片Photo: User:Famartin, CC BY-SA 4.0 · 版权credits
白面包不同重量的热量White bread by weight
| 重量Amount | kcal | 蛋白质 gProtein g | 碳水 gCarbs g | 脂肪 gFat g |
|---|---|---|---|---|
| 50 g | 133 | 4.4 | 24.7 | 1.7 |
| 100 g | 266 | 8.8 | 49.4 | 3.3 |
| 150 g | 399 | 13.2 | 74.1 | 5 |
| 200 g | 532 | 17.6 | 98.8 | 6.6 |
主食是碳水化合物的主要来源。《中国居民膳食指南(2022)》建议每天谷类 200–300 g（其中全谷物和杂豆 50–150 g），薯类 50–100 g。 在本站 17 种主食中，白面包的热量由低到高排第 15 位。
Staples are the main source of carbohydrate. The Chinese Dietary Guidelines 2022 suggest 200–300 g of grains a day (50–150 g whole grains and pulses) plus 50–100 g tubers. Among the 17 staples on this site, white bread ranks #15 from lowest to highest in calories.
与同类食物对比（每100克）Compared with similar foods (per 100 g)
| 食物Food | kcal | 蛋白质 gProtein g | 每100kcal蛋白质Protein /100 kcal |
|---|---|---|---|
| 意大利面（煮）Pasta, cooked | 158 | 5.8 | 3.7 |
| 全麦面包Whole-wheat bread | 252 | 12.4 | 4.9 |
| 白面包White bread | 266 | 8.8 | 3.3 |
| 馒头Mantou (plain steamed bun) | 268 | 6.7 | 2.5 |
| 燕麦片（干）Rolled oats, dry | 389 | 16.9 | 4.3 |
常见问题FAQ
100克白面包多少热量？How many calories in 100 g of white bread?
约 266 千卡（kcal），蛋白质 8.8 g、碳水化合物 49.4 g、脂肪 3.3 g（USDA FDC 174924）。
About 266 kcal, with 8.8 g protein, 49.4 g carbohydrate and 3.3 g fat (USDA FDC 174924).
白面包的蛋白质含量高吗？Is white bread high in protein?
每 100 kcal 约含 3.3 g 蛋白质，属于较低蛋白密度（本站以 ≥10 g/100 kcal 为高、5–10 为中等）。
It provides about 3.3 g protein per 100 kcal — low protein density (we call ≥10 g/100 kcal high, 5–10 moderate).
减脂期可以吃白面包吗？Can I eat white bread while losing weight?
可以，关键是份量和全天总热量。150 g 约 399 kcal，约占 1800 kcal 目标的 22%。把它记到对应餐次，看是否在该餐的建议范围内。
Yes — portion and daily total matter most. 150 g is about 399 kcal, roughly 22% of an 1,800 kcal target. Log it to see whether the meal stays in range.