BMI Calculator

Understanding BMI

Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is BMI = kg/m² where kg is a person's weight in kilograms and m² is their height in meters squared.

BMI is an inexpensive and easy screening method for weight category—underweight, healthy weight, overweight, and obesity. It is important to understand that BMI is not a diagnostic tool but rather a screening method.

BMI Categories:

  • Underweight: BMI less than 18.5
  • Normal weight: BMI 18.5 – 24.9
  • Overweight: BMI 25 – 29.9
  • Obesity: BMI 30 or greater

Risks Associated with Being Overweight:

Being overweight increases the risk of several serious diseases and health conditions, including:

  • High blood pressure
  • Higher levels of LDL cholesterol ("bad cholesterol"), lower levels of HDL cholesterol ("good cholesterol"), and high levels of triglycerides
  • Type II diabetes
  • Coronary heart disease
  • Stroke
  • Gallbladder disease
  • Osteoarthritis
  • Sleep apnea and breathing problems
  • Certain cancers (endometrial, breast, colon, kidney, gallbladder, liver)
  • Low quality of life
  • Mental illnesses such as clinical depression, anxiety, and others
  • Body pains and difficulty with certain physical functions
  • Increased risk of mortality compared to those with a healthy BMI

It is generally recommended to maintain a BMI below 25 kg/m², but it is important to consult with a healthcare provider to determine the best weight management plan.

Risks Associated with Being Underweight:

Being underweight can also pose health risks, including:

  • Malnutrition, vitamin deficiencies, anemia
  • Osteoporosis
  • Decreased immune function
  • Growth and development issues in children and teenagers
  • Reproductive issues for women due to hormonal imbalances
  • Potential complications as a result of surgery
  • Increased risk of mortality compared to those with a healthy BMI

Being underweight can sometimes indicate underlying conditions such as anorexia nervosa. It's important to consult a healthcare provider if there are concerns about being underweight.

Limitations of BMI:

Although BMI is a widely used indicator of healthy body weight, it has limitations. BMI does not account for differences in muscle mass, bone density, and fat distribution. For example:

  • Older adults may have more body fat than younger adults with the same BMI
  • Women typically have more body fat than men for an equivalent BMI
  • Muscular individuals and athletes may have higher BMIs due to muscle mass

BMI should be considered along with other measurements and factors when assessing a person's overall health.

Disclaimer: This BMI calculator is not a substitute for professional medical advice, diagnosis, or treatment. Always consult with a healthcare provider for advice about your health and wellness.