BMI Calculator
What is Body Mass Index (BMI)?
Body Mass Index (BMI) is a simple screening tool used by health professionals globally to categorize a person’s weight relative to their height. It provides a quick estimate of body fat and helps determine if you are in a healthy weight range.
Whether you want to lose weight or build muscle, knowing your BMI is the first step. Our calculator updates instantly and works with both Metric (kg/cm) and Imperial (lbs/ft) units.
Understanding Your Results
The World Health Organization (WHO) defines the standard BMI categories. Find your result below to see what it means:
You may need to gain weight for optimal health. Consult a nutritionist.
Great job! You are within the healthy weight range for your height.
You may be carrying excess weight. Consider a balanced diet.
Higher risk of health issues. Please consult a doctor.
⚠️ Is BMI Accurate for Everyone?
While BMI is a useful starting point, it is a simple mathematical formula that does not distinguish between muscle and fat.
- Athletes: Muscle is denser than fat. A bodybuilder might score as "Overweight" despite having low body fat.
- Seniors: Older adults may lose muscle mass, meaning a "Normal" BMI could hide a higher body fat percentage.
Frequently Asked Questions
In the metric system, the formula is your weight (kg) divided by your height in meters squared (m²).
Formula: BMI = kg / m²
The standard BMI calculation uses the same math for both adult men and women. However, women naturally tend to have more body fat than men at the same BMI score.
For the most consistent results, weigh yourself in the morning, right after using the restroom and before eating breakfast or drinking water.