BMI Calculator
Calculate your Body Mass Index (BMI) to check if you're underweight, normal weight, overweight, or obese
📋 Quick Examples:
Understanding BMI (Body Mass Index)
📊 Global BMI Categories
- Under 18.5 Underweight
- 18.5 - 24.9 Normal weight
- 25.0 - 29.9 Overweight
- 30.0+ Obese
🧮 BMI Formula
BMI = Weight (kg) ÷ Height² (m²)
BMI is calculated by dividing your weight in kilograms by your height in meters squared.
Example: 70kg ÷ (1.75m)² = 22.86
⚠️ Important Limitations of BMI
- Muscle Mass: BMI does not distinguish between fat and muscle. Bodybuilders often classify as "obese" despite having very low body fat.
- Age and Gender: Women naturally have more body fat than men at the same BMI. Older adults tend to have more body fat than younger adults.
- Pregnancy: BMI is not an accurate measurement during pregnancy.
Complete Guide to Body Mass Index (BMI) & Indian Health Standards
The Body Mass Index (BMI) is a widely used screening tool that estimates whether an individual has a healthy body weight for a person of their height. While it doesn't measure body fat directly, it correlates closely with direct measures of body fat, making it an inexpensive and quick method to screen for weight categories that may lead to health problems.
Global (WHO) vs. Indian/Asian BMI Standards
A crucial factor to understand—especially for users in India—is that the standard World Health Organization (WHO) BMI cut-offs do not always accurately reflect the health risks for Asian populations. Research shows that people of South Asian descent tend to have higher body fat percentages and a higher risk of cardiovascular diseases and type 2 diabetes at lower BMI levels compared to Caucasian populations.
Because of this, health authorities like the Ministry of Health and Family Welfare (India) and the Indian Council of Medical Research (ICMR) recommend modified, stricter BMI cut-offs for Indians:
| Category | Global (WHO) Standard | Indian/Asian Standard |
|---|---|---|
| Normal Weight | 18.5 - 24.9 | 18.5 - 22.9 |
| Overweight | 25.0 - 29.9 | 23.0 - 24.9 |
| Obese | 30.0 and above | 25.0 and above |
Health Risks Associated with Abnormal BMI
Maintaining a healthy BMI is crucial for long-term health and wellness. Falling outside the normal range can increase the risk of various health conditions.
Risks of a High BMI (Overweight/Obesity)
- High blood pressure (Hypertension)
- Type 2 diabetes and insulin resistance
- Coronary heart disease and stroke
- Sleep apnea and respiratory problems
- Osteoarthritis (a breakdown of cartilage and bone within a joint)
Risks of a Low BMI (Underweight)
- Malnutrition and vitamin deficiencies
- Osteoporosis (weak and brittle bones)
- Decreased immune function and frequent illnesses
- Fertility issues in both men and women
Frequently Asked Questions (FAQs)
How to Use BMI Calculator
Enter Weight
Input your current weight in kilograms
Enter Height
Input your height in centimeters
Optional Details
Add age and gender for context
Get Results
See your BMI value and category
B. KUMAR
Founder of Discount Calculator
B. KUMAR is a seasoned developer and retail data analyst with over a decade of experience building custom e-commerce infrastructure and financial calculators. Passionate about consumer rights and digital literacy, he builds tools to help Indians decode complex marketing algorithms and make informed financial decisions.