BMI Calculator – WebVaults

BMI Calculator

Body Mass Index (BMI) is a measure of body fat based on height and weight. Use this calculator to check your BMI, understand your weight category, and see the healthy weight range for your height.

Metric Imperial

Height (cm): Weight (kg):

Height:

Weight (lbs):

Your BMI Result:

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Underweight Normal Overweight Obese

Understanding BMI

BMI (Body Mass Index) is a quick assessment of a person's weight relative to their height, and is widely used to categorize individuals as underweight, normal weight, overweight, or obese. The formula for BMI is weight divided by height squared. In metric units, it's calculated as weight (kg) ÷ [height (m)]². In US/imperial units, it’s calculated as weight (lb) ÷ [height (in)]² × 703.

**BMI Categories:** According to health organizations, a BMI below 18.5 is considered **Underweight**, 18.5 to 24.9 is a **Normal (Healthy) Weight**, 25.0 to 29.9 is **Overweight**, and 30.0 and above is categorized as **Obese**. These categories help identify potential health risks. For example, being underweight may indicate malnutrition or other health issues, while a high BMI (overweight or obese) is associated with a higher risk of health problems like heart disease and diabetes.

**Limitations:** BMI is a useful screening tool but it does not directly measure body fat percentage or distribution. Highly muscular individuals may have a high BMI but low body fat, while older adults can have a normal BMI but higher body fat. Therefore, consider BMI as one of several indicators of health. It's important to also account for other factors like muscle mass, waist circumference, and overall lifestyle.

**Health Advice:** If your BMI falls outside the normal range, you may want to consult a healthcare provider for guidance. Maintaining a healthy weight through balanced diet and regular exercise is recommended. Underweight individuals should ensure sufficient nutrition, whereas overweight individuals might benefit from a controlled diet and increased physical activity. Always seek professional advice for personalized health recommendations.

In addition to BMI, you can explore other useful health calculators:

• Calorie Calculator – estimate your daily caloric needs to maintain, lose, or gain weight.
• Body Fat Calculator – determine your body fat percentage for a more detailed assessment of body composition.
• Ideal Weight Calculator – find a suggested healthy weight range based on your height and other factors.

Definitions

BMI (Body Mass Index): A numerical value of your weight in relation to your height. It’s calculated as your weight divided by your height squared, and is used to categorize weight status.

Underweight: A BMI less than 18.5. Indicates weight that is lower than what is generally considered healthy for a given height.

Normal Weight: A BMI between 18.5 and 24.9. This range is associated with the lowest risk of weight-related health problems.

Overweight: A BMI between 25.0 and 29.9. Indicates an excess weight relative to height, potentially increasing the risk of health issues.

Obese: A BMI of 30.0 or higher. Signifies a significantly high amount of body weight/fat, associated with higher risk of health complications.

Ideal Weight: The weight range (usually defined by a BMI of ~18.5–24.9) considered optimal for health for a given height.