BMI Calculator
Calculate Body Mass Index (BMI) online with both WHO International and Asian-Indian (ICMR) consensus standards, healthy weight range, and BMI Prime.
Adjust Parameters
Body Measurements
E.g., 170 cm is approximately 5 feet 7 inches.
Standard weight measured without heavy footwear.
Height: 175 cm | Weight: 70 kg
Clinical Classification Comparison
ICMR & WHONormal Weight
Normal range: 18.0 – 22.9 kg/m²
Ideal weight: 55.1 – 70.1 kg
Normal Weight
Normal range: 18.5 – 24.9 kg/m²
Ideal weight: 56.7 – 76.3 kg
🎉 Congratulations! Your current weight is within the healthy range for Asian Indians.
Why Asian Indians Have Lower BMI Cut-Offs
For decades, international health guidelines used the World Health Organization (WHO) BMI standards developed primarily from Caucasian population data. However, extensive clinical studies conducted by the Indian Council of Medical Research (ICMR) and the Association of Physicians of India (API) revealed that:
- Higher Body Fat Percentage: At any given BMI level, South Asians have a significantly higher percentage of body fat and lower muscle mass compared to Western counterparts.
- Abdominal & Visceral Adiposity: Indians are genetically predisposed to accumulating visceral fat around vital organs (the “thin-fat” Indian phenotype), which directly drives insulin resistance, Type 2 diabetes, fatty liver disease, and premature coronary artery disease.
- Lower Threshold for Metabolic Risk: Cardiometabolic risk escalates sharply at a BMI of 23.0 kg/m² in Indians, whereas Western risk curves escalate at 25.0 kg/m².
Official BMI Cut-Off Table (Comparison)
| Category | WHO Global (kg/m²) | Asian-Indian / ICMR (kg/m²) |
|---|---|---|
| Underweight | < 18.5 | < 18.0 |
| Normal Weight | 18.5 – 24.9 | 18.0 – 22.9 |
| Overweight | 25.0 – 29.9 | 23.0 – 24.9 |
| Obese | ≥ 30.0 | ≥ 25.0 |
How This Is Calculated
Transparent mathematical formulas and assumptions used across our financial engines.
Variables & Legend
Step-by-Step Calculation
- Convert Height to Meters:
h_m = \frac{\text{Height (cm)}}{100}Convert stature from cm or feet/inches to meters.
- Square Height:
(h_m)^2Compute height squared.
- Compute BMI:
\frac{w_{kg}}{(h_m)^2}Divide body weight in kg by height squared.
Conventions & Assumptions
- Asian Indians have higher body fat and metabolic risk at lower BMIs; ICMR guidelines classify BMI ≥ 23.0 as Overweight and ≥ 25.0 as Obese.
- BMI is a screening tool, not a diagnostic measure of body fat percentage or muscularity.