BMI Calculator
Calculate Body Mass Index (BMI) and healthy weight ranges based on height and weight.
Understanding BMI Categories
Explore Body Mass Index metrics, health categories, imperial/metric formulas, and clinical significance.
How to Calculate & Use the BMI Calculator
Calculate your Body Mass Index instantly with our free BMI calculator. BMI is a screening metric used by medical professionals to estimate whether an individual is at a healthy weight relative to their height. Toggle between metric and imperial systems, check your weight classification on our visual chart, and learn about healthy body ranges.
Input & Variable Breakdown:
- Unit System: Bounded variable used in the formulas.
- Weight: Bounded variable used in the formulas.
- Height (cm): Bounded variable used in the formulas.
- Height (Feet): Bounded variable used in the formulas.
- Height (Inches): Bounded variable used in the formulas.
Related Calculators
Calculate Basal Metabolic Rate (BMR), the number of calories burned at rest.
Calorie CalculatorCalculate daily calorie needs to maintain, lose, or gain weight based on activity.
Water Intake CalculatorEstimate daily hydration and water intake requirements based on body weight and exercise.
Frequently Asked Questions
The formula for BMI is: Weight (kg) / Height (m)^2 for metric, or (Weight (lbs) / Height (in)^2) * 703 for imperial.
According to the World Health Organization (WHO): Underweight is less than 18.5, Normal weight is 18.5 to 24.9, Overweight is 25.0 to 29.9, and Obese is 30.0 or greater.
BMI does not distinguish between muscle mass and fat. Consequently, athletes or bodybuilders with high muscle mass may be classified as 'overweight' or 'obese' despite having low body fat.