BMI Calculator
A simple and accurate way to check if your weight is in a healthy range for your height. Perfect for adults of all ages.
Your BMI Result
What is BMI?
Body Mass Index (BMI) is a simple index of weight-for-height that is commonly used to classify underweight, overweight, and obesity in adults. It is defined as a person's weight in kilograms divided by the square of their height in meters (kg/m²).
Understanding Your Results
BMI provides a useful population-level measure of overweight and obesity. However, it should be used as a guide only, as it does not account for muscle mass, bone density, or overall body composition.
- Underweight (Below 18.5): You may need to consult a health professional about your nutrition.
- Normal Weight (18.5 – 24.9): You are in a healthy weight range for your height.
- Overweight (25 – 29.9): You are slightly above the healthy range and may benefit from increased physical activity.
- Obese (30 or higher): You are in the obese category, which may increase the risk of certain health conditions.
BMI Limitations
While BMI is a great starting point, athletes with high muscle mass may have a high BMI despite having low body fat. Always consult with a healthcare provider for a thorough health assessment.
Frequently Asked Questions
What is a healthy BMI range?
A healthy BMI for adults is between 18.5 and 24.9. Below 18.5 is considered underweight, 25-29.9 is overweight, and 30 or above is classified as obese.
Is BMI accurate for athletes?
BMI doesn't account for muscle mass, so athletes with high muscle mass may have a high BMI despite having low body fat. It's best used as a general screening tool, not a definitive measure of health.
Can I use this calculator for children?
This calculator is designed for adults aged 18 and over. Children and teenagers have different BMI standards that account for age and gender. Consult a pediatrician for child BMI assessments.
What's the difference between metric and imperial?
Metric uses kilograms and meters (kg/m²), while Imperial uses pounds and inches (lbs/in²). Our calculator supports both systems - just select your preferred unit system.
Should I be concerned if my BMI is high?
A high BMI can indicate increased health risks, but it's just one factor. Consult with a healthcare provider who can assess your overall health, body composition, and lifestyle factors.