BMI Calculator

Use our online BMI calculator to easily calculate your body mass index using your height and weight. The BMI calculator for adults and kids helps you understand your health status, whether you’re underweight, normal, overweight, or obese. Stay informed with accurate BMI results, and use this fitness and wellness calculator to improve your health goals.

BMI Introduction

BMI (Body Mass Index) is a simple, scientific method to measure body composition online. It determines if your weight is healthy for your height. The BMI health assessment tool is widely used for fitness goal setting, nutrition tracking, and understanding metabolic health indicators.

Result

Your BMI result shows how your weight relates to your height and which BMI category you fall under. The body mass index calculator instantly displays your health range — helping you track BMI for fitness goals and monitor your overall body composition effectively.

BMI Table for Adults

Category	BMI Range (kg/m²)
Underweight	Below 18.5
Normal weight	18.5 – 24.9
Overweight	25 – 29.9
Obese	30 and above

This BMI table for adults helps check if you’re underweight or overweight and provides an ideal body weight calculator guide for maintaining a healthy lifestyle measurement.

BMI Chart for Adults

The BMI chart for men and women visually represents the healthy weight calculator ranges, helping you understand your BMI category quickly. It’s an easy way to find your healthy weight range and assess your physical health evaluation.

BMI Table for Children and Teens, Age 2–20

For children and teens, BMI is compared against others of the same age and sex. The BMI calculator for kids uses percentile growth charts to ensure accurate BMI analysis and healthy development tracking.

Category	Percentile Range
Underweight	Below 5th percentile
Healthy weight	5th – 85th percentile
Overweight	85th – 95th percentile
Obese	Above 95th percentile

BMI Chart for Children and Teens, Age 2–20

This BMI chart for children and teens allows parents to measure body composition online and monitor growth effectively. It’s a valuable digital health calculator tool that supports wellness and body analysis during key growth years.

Risks Associated with Being Overweight

Being overweight increases the risk of several health and wellness issues, including:

Heart disease and high blood pressure
Type 2 diabetes and joint problems
Sleep apnea and metabolic disorders

Using our BMI and metabolism calculator, you can track progress and adopt nutrition and wellness guides to manage your weight effectively.

Risks Associated with Being Underweight

Being underweight can also be risky. It may lead to:

Nutrient deficiencies and weakened immunity
Low muscle mass and fatigue
Hormonal imbalance and bone health issues

Our BMI and body fat calculator acts as a personal fitness tracker to help you find your healthy weight range and maintain balance.

Limitations of BMI

While BMI calculators are useful for identifying general health trends, they don’t measure body fat percentage directly. Athletes may have a high BMI due to muscle, not fat. That’s why it’s best to use BMI alongside other fitness assessment tools and health and wellness metrics.

BMI Formula

BMI Prime

BMI Prime is your BMI divided by 25 (the upper limit of the “normal” range).

A BMI Prime under 1.0 means you’re below the healthy weight range, while over 1.0 suggests overweight. It’s a valuable health and wellness metric for fitness progress evaluation.

Ponderal Index

The Ponderal Index (PI) offers another way to assess body composition analysis:

Unlike BMI, it considers body shape more accurately, making it useful for fitness goal tracking and metabolic health assessment.