BMI calculator
Calculate your body mass index (BMI) and see your weight category and healthy weight range for your height – using Asian/Indian or international WHO cut-offs.
- Runs in your browser – private
- Instant results
- Free forever, no sign-up
How to use the BMI Calculator
- 1
Choose metric (kg, cm) or imperial (lb, ft/in) units.
- 2
Enter your weight and height, and pick Asian/Indian or WHO classification.
- 3
See your BMI, category and healthy weight range.
BMI formula
Example: 68 kg and 1.70 m → 68 ÷ (1.70 × 1.70) = 23.5.
BMI chart: Asian/Indian vs WHO
Research shows South Asians tend to have higher health risks at lower BMI levels, so Indian guidelines use lower cut-offs than the international WHO classification:
- Underweight: below 18.5 (both)
- Normal: 18.5–22.9 (Asian/Indian) · 18.5–24.9 (WHO)
- Overweight: 23–24.9 (Asian/Indian) · 25–29.9 (WHO)
- Obese: 25 and above (Asian/Indian) · 30 and above (WHO)
Limitations of BMI
BMI is a quick screening measure, not a diagnosis. It does not distinguish muscle from fat, so athletes may show a high BMI, and it does not show where fat is stored. Waist circumference, blood tests and a doctor's assessment give a fuller picture. BMI charts for children and teenagers use age- and sex-specific percentiles, so this calculator is meant for adults. Talk to a qualified doctor or dietitian before making major changes to diet or exercise.
Frequently asked questions
What is a normal BMI for Indians?
Under Asian/Indian guidelines a normal BMI is 18.5 to 22.9. A BMI of 23–24.9 is considered overweight and 25 or above obese.
How do I calculate BMI in kg and cm?
Convert height to metres (cm ÷ 100), square it and divide your weight in kg by that number. The calculator does it instantly.
What is my ideal weight for my height?
The healthy weight range shown is the weight that keeps your BMI between 18.5 and the upper normal limit for your chosen classification.
Is BMI accurate for athletes?
Not always. Muscular people can have a high BMI without excess fat. Use BMI alongside waist size and medical advice.
Can children use this BMI calculator?
No. Children and teens need age- and sex-specific BMI percentile charts. Consult a paediatrician.