China 中国
Calculators using Chinese and East Asian standards
Key difference: China uses its own BMI standard (WGOC 2004) — overweight starts at BMI 24 (not 25 like WHO) and obese starts at 28 (not 30). This means millions of people classified as "normal weight" by WHO are "overweight" in China.
The Working Group on Obesity in China (WGOC) 2004 guidelines set lower BMI thresholds than WHO: normal is 18.5–23.9, overweight (超重) is 24.0–27.9, and obese (肥胖) is ≥28.0. Studies showed Chinese adults develop metabolic disease at lower BMI than Westerners.
Chinese schools and universities use the 百分制 (bǎifēnzhì, 100-point scale): 优秀 Excellent (≥90), 良好 Good (80–89), 中等 Average (70–79), 及格 Pass (60–69), 不及格 Fail (<60). Universities also assign GPA on a 4.0 or 5.0 scale depending on the institution.
Tipping is not part of Chinese dining culture. In mainland China, service staff receive regular salaries and tips may even cause confusion or mild offense. High-end international hotels in Shanghai/Beijing may have adopted Western tipping norms for foreign guests, but it remains uncommon.
China uses Celsius exclusively as part of the SI metric system adopted in 1984. Summer temperatures in cities like Wuhan and Nanjing regularly exceed 40°C, making understanding the Celsius scale critical for travelers.
China officially uses the metric system (公制), but traditional units survive: 斤 (jīn = 500g) for market produce, 里 (lǐ = 500m) in some contexts, 亩 (mǔ ≈ 667m²) for farmland, 分 (fēn = 1/10 of various units). Markets price by 斤, not kilograms.
China's Dietary Guidelines (膳食指南, 2022, China Nutrition Society) recommend 1,800–2,250 kcal/day for adult men and 1,500–1,800 kcal/day for women — slightly lower than US DRI recommendations, reflecting average lower body mass.
China BMI Standard vs. the World
The 2004 WGOC (Working Group on Obesity in China) study analyzed health data from 240,000 Chinese adults and found that cardiovascular and metabolic risks appeared at lower BMI values than in Western populations. This led to uniquely Chinese thresholds:
| Category | 🌍 WHO Global | 🇨🇳 China (WGOC) | 🇯🇵 Japan (JASSO) | 🌏 Asia-Pacific |
|---|---|---|---|---|
| Underweight | < 18.5 | < 18.5 | < 18.5 | < 18.5 |
| Normal Weight | 18.5 – 24.9 | 18.5 – 23.9 | 18.5 – 24.9 | 18.5 – 22.9 |
| Overweight / 超重 | 25.0 – 29.9 | 24.0 – 27.9 | ≥ 25 (Obese) | 23.0 – 27.4 |
| Obese / 肥胖 | ≥ 30.0 | ≥ 28.0 | — (see above) | ≥ 27.5 |
Chinese Grading System: 百分制 vs. International
Chinese education from primary school through university uses a 100-point scale with letter-grade equivalents:
| Chinese Grade | Pronunciation | Score Range | US GPA | UK Class |
|---|---|---|---|---|
| 优秀 | Yōuxiù (Excellent) | 90 – 100 | 4.0 (A) | First |
| 良好 | Liánghǎo (Good) | 80 – 89 | 3.3–3.7 (B+) | Upper 2:1 |
| 中等 | Zhōngděng (Average) | 70 – 79 | 2.7–3.0 (B) | Lower 2:1 |
| 及格 | Jígé (Pass) | 60 – 69 | 2.0 (C) | 2:2 / Third |
| 不及格 | Bù jígé (Fail) | < 60 | F | Fail |
Traditional Chinese Units Still in Use
Despite official metrication, traditional Chinese units (旧制单位) survive in everyday life and markets:
| Unit | Pinyin | Metric Equivalent | Where Still Used |
|---|---|---|---|
| 斤 | Jīn | 500 g (0.5 kg) | Produce markets, groceries, body weight in casual speech |
| 两 | Liǎng | 50 g (1/10 斤) | Cooking, medicine, gold/silver |
| 里 | Lǐ | 500 m (0.5 km) | Informal distances, idioms ("千里之行") |
| 亩 | Mǔ | ≈ 667 m² | Farmland, real estate in rural areas |
| 丈 | Zhàng | ≈ 3.33 m | Traditional construction, martial arts |
| 尺 | Chǐ | ≈ 33.3 cm | Tailoring, carpentry, mirrors ("衣尺") |
China vs. Other Countries: Key Calculation Differences
- BMI: China's WGOC standard (overweight ≥24) is stricter than WHO (≥25) but less strict than Japan/Korea (obese ≥25). A person with BMI 24.5 is "normal" by WHO but "overweight" in China.
- Grading: China's 百分制 makes 60 the passing mark. In the US, 60% typically earns a D (barely passing). In China, 60 is 及格 (pass) — there's no partial-credit culture; you either pass or fail.
- Tipping: Like Japan, tipping is absent in mainland China. Unlike Japan where tip refusal is polite, in China it's simply not part of the interaction at all.
- Date format: China uses YYYY年MM月DD日 (year-month-day) — the same logical order as ISO 8601, opposite to US (MM/DD/YYYY) and UK (DD/MM/YYYY).
- Body weight: Many Chinese people express weight in 斤 (jin, 500g) rather than kilograms. A person weighing 65 kg would say they weigh "130斤".
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