BMI Calculator
Enter your height and weight below to calculate your Body Mass Index (BMI) and find your healthy weight range.
How to Use This BMI Calculator
Getting your Body Mass Index is simple. Follow these steps:
- Select Your Units: Choose between US (pounds/feet), Metric (kg/cm), or Other units using the tabs at the top.
- Enter Your Details: Input your age, gender, height, and weight.
- Calculate: Click the blue "Calculate BMI" button.
- View Results: Your BMI value and health category will appear instantly.
- Reset: Click the gray "Reset" button to clear the form.
Understanding Your Body Mass Index (BMI) Results
The Body Mass Index (BMI) is a simple screening tool widely used by healthcare professionals to identify weight-related health risks. It is calculated based on your height and weight (`kg/m²`) and applies to adult men and women.
BMI Categories and Health Implications
| BMI Range (kg/m²) | Weight Status | Health Risk Level |
|---|---|---|
| Below 18.5 | Underweight | Increased risk of nutritional deficiency |
| 18.5 – 24.9 | Normal Weight | Low Risk (Healthy Range) |
| 25.0 – 29.9 | Overweight | Increased risk of developing health problems |
| 30.0 and Above | Obesity | High risk of cardiovascular diseases |
Health Risks of Being Overweight (High BMI)
A BMI above 25 signifies that you may be carrying excess weight. Obesity is a significant risk factor for several chronic conditions, including:
- Type 2 Diabetes
- High blood pressure (Hypertension)
- Heart disease and Stroke
- Sleep apnea and breathing problems
- Joint pain (Osteoarthritis)
Health Risks of Being Underweight (Low BMI)
Having a BMI below 18.5 can also pose health risks. Being underweight may be due to malnutrition, genetics, or underlying health issues. Risks include:
- Weakened immune system
- Osteoporosis and fragile bones
- Anemia and vitamin deficiencies
- Fertility issues
Limitations of the BMI Calculator
While BMI is a useful general indicator, it is not a direct measure of body fat. It does not account for muscle mass, bone density, or fat distribution. Athletes may have a high BMI due to muscle weight but low body fat. Elderly adults may have a "normal" BMI but lose muscle mass (sarcopenia). Always consult a doctor for a comprehensive health assessment.
Frequently Asked Questions (FAQ)
Is BMI different for men and women?
The standard BMI formula is the same for adult men and women. However, women naturally tend to have more body fat than men at the same BMI level.
Why is my BMI high if I work out?
Muscle tissue is denser than fat tissue. If you are muscular or an athlete, your BMI might indicate "overweight" even if your body fat percentage is low.
What is the best time to weigh myself?
For the most consistent results, weigh yourself first thing in the morning after using the restroom and before eating or drinking.