BMI Calculator
Check your Body Mass Index and understand your health status
Ready to Calculate
Enter your height and weight to see your BMI result.
About BMI
Body Mass Index (BMI) is a simple screening tool to estimate the amount of body fat. It works by dividing your weight in kilograms by the square of your height in meters.
Limitations
BMI is a useful general indicator but it does not differentiate between muscle and fat. Athletes may have a high BMI but low body fat. Always consult a doctor for a full assessment.
How to Calculate BMI Manually
Metric Formula
Imperial Formula
Example: A person weighing 70kg and 1.75m tall.
70 ÷ (1.75 × 1.75) = 70 ÷ 3.0625 = 22.86 BMI
Comprehensive Guide to BMI
Body Mass Index (BMI) is a screening tool used to identify potential weight problems in adults. It is calculated by dividing a person's weight in kilograms by the square of their height in meters.
BMI Categories Breakdown
| Category | BMI Range (kg/m²) | Health Risk |
|---|---|---|
| Underweight | Less than 18.5 | Malnutrition, Osteoporosis |
| Normal Weight | 18.5 - 24.9 | Low Risk |
| Overweight | 25.0 - 29.9 | Increased Risk |
| Obesity | 30.0 or Higher | High Risk |
Risks of Being Overweight
- Type 2 Diabetes and Insulin Resistance
- High Blood Pressure (Hypertension)
- Heart Disease and Stroke
- Sleep Apnea and Breathing Problems
- Joint Pain and Osteoarthritis
Risks of Being Underweight
- Malnutrition and Vitamin Deficiencies
- Weakened Immune System
- Osteoporosis (Weak Bones)
- Fertility Issues
- Developmental Delays (in young people)