BMI is the most widely used starting point for evaluating weight status. Our body mass index calculator computes your BMI instantly, classifies it against standard WHO categories, and provides healthy weight range guidance — all tailored for Indian health standards.
What is Body Mass Index (BMI)?
Body Mass Index (BMI) is a screening tool that estimates body fat based on weight relative to height. It's calculated by dividing a person's weight (in kg) by the square of their height (in metres). BMI is used by doctors, nutritionists, insurance companies, and fitness experts as a quick initial assessment of healthy weight status.
Formula
BMI = Weight (kg) / Height² (m²)
Example: 70 kg, 170 cm → BMI = 70 / (1.70)² = 70 / 2.89 = 24.2
BMI Categories (WHO)
- Underweight: BMI below 18.5
- Normal weight: BMI 18.5 – 24.9
- Overweight: BMI 25.0 – 29.9
- Obese (Class I): BMI 30.0 – 34.9
- Obese (Class II+): BMI 35.0 and above
How to Use This Calculator
- Enter your Weight in kilograms.
- Enter your Height in centimetres.
- Click Calculate to see your BMI, category, and healthy weight range.
Real Life Use Cases
- Annual Health Check: Track BMI trends year-over-year to monitor long-term health.
- Doctor Consultations: BMI is the first metric doctors assess when discussing weight management.
- Insurance Premium Calculation: Life and health insurers use BMI as a risk factor.
- Fitness Goal Setting: Use BMI as a baseline before starting a weight loss or muscle-building programme.
FAQs
Is BMI accurate for all body types?
BMI is a useful screening tool but doesn't distinguish between muscle and fat. Athletes and bodybuilders often have high BMI despite very low body fat. It should be used alongside other measurements like waist circumference and body fat percentage.
Should Indians use different BMI cutoffs?
Yes. Research suggests Asian populations (including Indians) face metabolic risks at lower BMI values. Many Indian health guidelines recommend the "overweight" cutoff at BMI 23 and "obese" at 25 for Indians.
Common Use Cases for Body Mass Index Calculator
- Use this Body Mass Index Calculator for quick, accurate online calculations — no app needed
- Ideal for students, professionals, and anyone planning finances or health goals
- Get instant results right in your browser — 100% private, no data stored
- Bookmark this page to use the Body Mass Index Calculator anytime, on any device