Health
BMI Calculator
Calculate your Body Mass Index to find out if you are at a healthy weight for your height.
Instant Results
100% Free
Mobile Ready
BMI Calculator
Enter a valid weight.
Enter a valid height.
–
Your BMI
—
—
Underweight
<18.5 Normal
18.5–24.9 Overweight
25–29.9 Obese
≥30
<18.5 Normal
18.5–24.9 Overweight
25–29.9 Obese
≥30
—Status
—Healthy Range
What Is BMI?
Body Mass Index (BMI) is a numerical value derived from a person's weight and height. It is a widely used screening tool to assess whether an individual has a healthy body weight relative to their height.
BMI Formula
The standard formula is: BMI = Weight (kg) ÷ Height² (m²). For imperial units: BMI = (Weight in lbs × 703) ÷ Height² (in²).
BMI Categories
- Underweight: Below 18.5
- Normal weight: 18.5 – 24.9
- Overweight: 25 – 29.9
- Obese Class I: 30 – 34.9
- Obese Class II: 35 – 39.9
- Obese Class III: 40 +
Health Risks
A BMI outside the normal range is associated with increased risk of type 2 diabetes, cardiovascular disease, sleep apnoea, and certain cancers.
Limitations of BMI
BMI does not distinguish between muscle and fat. Athletes may have a high BMI due to muscle mass. For a complete picture consult a healthcare professional.
Tips for a Healthy BMI
- Eat a balanced diet rich in fruits, vegetables, whole grains, and lean protein.
- Aim for 150 minutes of moderate aerobic exercise per week.
- Limit processed food, added sugar, and saturated fats.
- Stay well hydrated.
- Get regular health check-ups.