BMI Calculator
Check your body mass index instantly.
Height
Weight
Your BMI is 8.4
Category: Underweight
| BMI Category | Weight Range (lbs) |
|---|---|
| Underweight (Below 18.5) | Less than 121.7 lbs |
| Healthy (18.5 – 24.9) | 121.7 lbs – 163.8 lbs |
| Overweight (25.0 – 29.9) | 164.4 lbs – 196.7 lbs |
| Obesity (30.0 or above) | More than 197.3 lbs |
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About the BMI Calculator
Body Mass Index (BMI) compares your weight with your height to show whether you are in a healthy weight range. BMI = weight in kilograms ÷ (height in metres)². Enter your height and weight in metric (cm, kg) or standard (feet, inches, pounds) units.
The result uses the WHO adult categories: under 18.5 is underweight, 18.5–24.9 is normal, 25–29.9 is overweight and 30 or more is obese.
How to use the BMI Calculator
- Choose Standard or Metric at the top of the input panel.
- Enter height and weight (feet + inches + pounds, or cm + kg).
- Click Calculate to see your BMI, category, and gauge position.
- Use the table to see recommended weight ranges for each BMI category at your height.
- Reset clears inputs to start over.
Tips
- BMI is a screening tool, not a medical diagnosis.
- Athletes with high muscle mass may have a higher BMI without excess fat.
Frequently asked questions
What is a healthy BMI?
For adults, the WHO considers a BMI of 18.5 to 24.9 to be in the normal range. Below 18.5 is underweight, 25 to 29.9 is overweight and 30 or above is obese.
Are BMI ranges different for people in Nepal and South Asia?
A WHO expert consultation found that many Asian populations face higher health risks at lower BMI. It suggested extra action points: a BMI of 23 or above as increased risk and 27.5 or above as high risk. Studies in Nepal often use these Asian cut-offs.
Is BMI accurate for everyone?
BMI is a quick screening tool, not a diagnosis. It does not separate muscle from fat, so athletes may score high, and it is not meant for children, pregnant women or the elderly in the same way. Talk to a doctor for a full health check.
How is BMI calculated?
Divide your weight in kilograms by your height in metres squared. For example, 65 kg at 1.70 m gives 65 ÷ (1.70 × 1.70) = 22.5.