BMI Calculator
Calculate your Body Mass Index (BMI) and understand your weight category with our comprehensive calculator. Supports both metric and imperial units for adults and children.
BMI Calculator
Ages: 2 - 120
feet
inches
pounds
BMI Categories for Adults
This is the World Health Organization's (WHO) recommended body weight based on BMI values for adults. It is used for both men and women, age 20 or older.
| Classification | BMI Range - kg/m² |
|---|---|
Severe Thinness | < 16 |
Moderate Thinness | 16 - 17 |
Mild Thinness | 17 - 18.5 |
Normal | 18.5 - 25 |
Overweight | 25 - 30 |
Obese Class I | 30 - 35 |
Obese Class II | 35 - 40 |
Obese Class III | > 40 |
Risks Associated with Being Overweight
Being overweight increases the risk of a number of serious diseases and health conditions:
- • High blood pressure
- • Higher levels of LDL cholesterol and lower levels of HDL cholesterol
- • 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 and mental health issues
Risks Associated with Being Underweight
Being underweight also has its own associated risks:
- • Malnutrition, vitamin deficiencies, anemia
- • Osteoporosis (bone weakness)
- • Decreased immune function
- • Growth and development issues
- • Reproductive issues for women
- • Potential complications from surgery
- • Increased risk of mortality