On This Page
- What is Asian BMI?
- Full classification table
- Applying the Asian threshold
- Thresholds by country
- Three results, read both ways
- Age and children
- How this calculator is verified
- Frequently asked questions
What Is Asian BMI?
Asian BMI uses the same formula as the standard BMI calculator, weight in kilograms divided by height in metres squared, but reads the result against lower cutoffs. The standard WHO bands came from European population studies. Measured directly, Asian adults carry more body fat at the same BMI and reach metabolic risk (raised blood glucose, insulin resistance, high blood pressure) at lower BMI values.[1]
The WHO Expert Consultation in 2004 recommended lower action points for Asian populations: Overweight from BMI 23 instead of 25, and Obese from 27.5 instead of 30.[1] Health authorities in Singapore, Japan, South Korea, India, Pakistan and across the Asia-Pacific use these or similar cutoffs.[2] The same thresholds apply to Asian Americans: the American Diabetes Association recommends screening patients of Asian descent for type 2 diabetes from BMI 23, because the standard US threshold underestimates their risk.[3][4]
Full Classification Table
The Asian BMI classification is: Underweight below 18.5, Normal 18.5–22.9, Overweight 23–27.4, Obese 27.5 and above.
| BMI range | Asian classification | Standard classification |
|---|---|---|
| Below 18.5 | Underweight | Underweight |
| 18.5 – 22.9 | Normal weight | Normal weight |
| 23.0 – 24.9 | Overweight | Normal weight |
| 25.0 – 27.4 | Overweight | Overweight |
| 27.5 – 29.9 | Obese | Overweight |
| 30.0 and above | Obese | Obese |
The bold rows are where the two scales disagree. BMI 23–24.9 matters most: the standard scale says Normal, the Asian scale says Overweight, and that is where the standard scale misses risk. The thresholds are the same for men and women, and underweight is 18.5 on both scales.
Applying the Asian Threshold
Work out BMI as usual (the BMI Calculator shows the metric and US steps in full), then read the number against the Asian table instead of the standard one. That single step is the whole difference, and the calculator above does it for you, showing both labels side by side. A BMI of 24.2 is Normal on the standard scale (below 25) but Overweight on the Asian scale (above 23).
BMI misses where fat sits. Waist measures have Asian thresholds too, 90 cm for men and 80 cm for women; see waist size and waist-to-height ratio for Asians. The Lean Body Mass Calculator splits fat from lean tissue, which BMI cannot. To apply these bands across a list in a spreadsheet, calculating BMI in Excel shows how to swap them into the nested IF.
Thresholds by Country
| Country / region | Overweight from | Obese from |
|---|---|---|
| Singapore, Philippines, Vietnam, Thailand, Indonesia, Bangladesh, Sri Lanka | 23 | 27.5 |
| India, Pakistan | 23 | 25 (many guidelines) |
| South Korea, Japan | 23 | 25 |
| China (mainland) | 24 | 28 |
| US: Joslin Asian American Diabetes Initiative | 24 | 27 |
This calculator uses the general WHO-adjusted cutoffs (23 and 27.5). Japanese, Korean and Indian national guidelines treat BMI 25 as obese, which is stricter than the result here[2], and for anyone of South Asian descent a BMI of 25 or more is clinically significant however it is labeled. China's National Health Commission uses 24 and 28 from its own population studies. The Joslin Diabetes Center uses 24 and 27 for Asian American patients.[7]
Three Results, Read Both Ways
| Person | BMI | Standard | Asian |
|---|---|---|---|
| 170 cm, 70 kg (70 ÷ 2.89) | 24.2 | Normal | Overweight |
| 165 cm, 59.9 kg (59.9 ÷ 2.7225) | 22.0 | Normal | Normal |
| South Asian, 175 cm, 79.6 kg (79.6 ÷ 3.0625) | 26.0 | Overweight | Overweight, and Obese under Indian and Pakistani guidelines (from 25) |
Below 23 the two scales always agree. The first person shows why the Asian scale exists: no concern on the standard table, but the same weight and height flagged as Overweight.
Age and Children
Adult cutoffs do not change with age: 24 is Overweight on the Asian scale at 30 and at 60, though some guidelines accept a slightly higher BMI after 65, when being underweight carries more risk. Under 18, neither adult scale applies. Children are assessed on age- and sex-specific percentile charts from the CDC[6] or WHO[5], and the calculator shows a note if you enter an age under 18.
How This Calculator Is Verified
The calculator computes BMI once, weight in kilograms over height in metres squared, then runs that single number through two lookup tables at the same time: the standard WHO bands (overweight at 25, obese at 30)[6] and the 2004 WHO Expert Consultation's Asian-adjusted bands (overweight at 23, obese at 27.5)[1]. A BMI of 24, for example, lands as Normal on the standard table but Overweight on the Asian table, purely because the two tables set their cutoffs at different points, not because the underlying weight or height changed. Both scales share the same underweight threshold of 18.5, since the WHO guidance never split that boundary by population in the first place.
Frequently Asked Questions
What is a healthy BMI for Asians?
Under the Asian-adjusted WHO thresholds, Normal weight is BMI 18.5 to 22.9. Below 18.5 is Underweight. At 23 or above, the Asian classification shifts to Overweight. This is narrower than the standard Normal range of 18.5–24.9.
What BMI is overweight for Asians?
BMI 23 or above. On the standard scale, Overweight begins at 25, so BMI 23–24.9 is the zone where someone reads as Normal on the standard scale but Overweight on the Asian scale. The Asian Obese threshold is 27.5 (compared to 30 on the standard scale).
What BMI is obese for Asians?
BMI 27.5 or above under the general WHO-adjusted thresholds. Japan, South Korea, and India often use a stricter cutoff of ≥ 25. The standard WHO Obese threshold is ≥ 30.
Do Indians and Pakistanis use the Asian BMI scale?
Yes. Indian and Pakistani guidelines generally use the Asian-adjusted thresholds with Overweight from BMI 23, and many apply a stricter Obese cutoff of BMI 25 rather than 27.5. South Asian populations show some of the highest metabolic risk per unit of BMI, which is why Indian and Pakistani guidelines are often stricter than the general Asian WHO recommendation.
What are the BMI thresholds for Japan and South Korea?
Both countries use Overweight ≥ 23 and Obese ≥ 25, the Obese cutoff is stricter than the general Asian WHO guideline of 27.5. Japan has applied BMI 25 as the obesity threshold since 2000. This calculator uses the general Asian WHO thresholds (Obese ≥ 27.5); Japanese and Korean users should note that their national guidelines classify Obese from BMI 25.
References
- WHO Expert Consultation (2004), Lancet 363(9403):157–63: the foundational paper recommending lower BMI action points for Asian populations.
- WHO/IASO/IOTF (2000), The Asia-Pacific Perspective: Redefining Obesity and its Treatment: the original regional report proposing Overweight ≥23 and Obese ≥25 for Asia-Pacific populations, the basis for stricter national guidelines such as Japan, South Korea, and India.
- Hsu et al. (2015), Diabetes Care 38(1):150–158: the study identifying BMI 23–24 as the sensitivity-optimal diabetes screening cut point across Asian American subgroups.
- American Diabetes Association Position Statement (2015), Diabetes Care 38(5):814–816: the ADA's formal recommendation to screen Asian Americans for type 2 diabetes starting at BMI ≥23, rather than the standard ≥25.
- WHO, Healthy lifestyle guidelines: WHO guidance on BMI, healthy weight, and global classification standards.
- CDC Adult BMI Calculator: standard WHO classification reference and adult BMI guidelines.
- Joslin Diabetes Center, Asian American Diabetes Initiative (AADI): clinical BMI cut-off points (Overweight 24, Obese 27) used by a leading U.S. diabetes research center for Asian American patients.