BMI 计算器BMI calculator
BMI = 体重(kg) ÷ 身高(m)²。同时显示中国标准和 WHO 标准。
BMI = weight (kg) ÷ height (m)². Shows both Chinese and WHO categories.
分类标准Categories
| 分类Category | 中国成人China adults | WHO |
|---|---|---|
| 偏瘦Underweight | < 18.5 | < 18.5 |
| 正常Normal | 18.5–23.9 | 18.5–24.9 |
| 超重Overweight | 24.0–27.9 | 25.0–29.9 |
| 肥胖Obese | ≥ 28.0 | ≥ 30 (I 30–34.9 · II 35–39.9 · III ≥40) |
WHO · 中国卫生行业标准 WS/T 428-2013《成人体重判定》China WS/T 428-2013 Adult weight determination
常见问题FAQ
中国的 BMI 标准和 WHO 有什么不同?How do China’s BMI cut-offs differ from WHO?
中国成人标准(WS/T 428-2013):<18.5 偏瘦,18.5–23.9 正常,24–27.9 超重,≥28 肥胖。WHO 标准:18.5–24.9 正常,25–29.9 肥胖前期,≥30 肥胖。亚洲人群在较低 BMI 时健康风险已上升,因此切点更低。
China (WS/T 428-2013): <18.5 underweight, 18.5–23.9 normal, 24–27.9 overweight, ≥28 obese. WHO: 18.5–24.9 normal, 25–29.9 pre-obesity, ≥30 obesity. Risk rises at lower BMI in Asian populations, so the cut-offs are lower.
BMI 适用于所有人吗?Does BMI apply to everyone?
不完全。BMI 不区分肌肉和脂肪,不适用于孕妇、儿童青少年(需用生长曲线),老年人适宜 BMI 可略高(中国膳食指南建议 65 岁以上 20–26.9)。
Not entirely. BMI doesn’t distinguish muscle from fat and isn’t used for pregnancy or under-18s (growth charts are). For 65+ the Chinese guideline suggests 20–26.9.