Body Mass Calculator

Find your ideal weight range based on height and body frame

Calculate Your BMI

Your BMI Results

Based on your height, weight, and body frame

BMI Value

--
--
16 18.5 25 30 40
Underweight Normal Overweight Obese

Ideal Weight Range

--

For your height with a medium body frame

Health Status:

--

Personalized BMI Insights

Calculate your BMI to get personalized insights based on your results.

Understanding Body Mass Index (BMI)

What is BMI?

Body Mass Index (BMI) is a numerical value of your weight in relation to your height. It is a commonly used indicator to categorize individuals as underweight, normal weight, overweight, or obese. BMI provides a simple measure to assess potential health risks associated with weight.

BMI Formula

Metric Formula:

BMI = Weight (kg) / Height² (m²)

Imperial Formula:

BMI = (Weight (lbs) × 703) / Height² (inches²)

What BMI Doesn't Tell You

While BMI is useful for population-level assessments, it has limitations. It doesn't distinguish between muscle and fat, nor does it account for age, sex, ethnicity, or body composition. Athletes may have a high BMI due to muscle mass, not excess fat.

BMI Categories

BMI Range Category Health Risk
Below 18.5 Underweight Increased
18.5 - 24.9 Normal weight Minimal
25.0 - 29.9 Overweight Increased
30.0 - 34.9 Obese (Class I) High
35.0 - 39.9 Obese (Class II) Very High
40.0 or higher Extreme Obesity Extremely High

Factoring in Body Frame

Body frame size can affect what is considered an ideal weight range. People with larger frames may naturally weigh more due to having larger bones and more muscle mass. Considering your body frame alongside BMI provides a more personalized understanding of your ideal weight range.

Factors Affecting Healthy Weight

Genetics

Genetic factors can influence your body type, metabolism, and predisposition to store fat. Your natural body shape and how your body responds to diet and exercise are partly determined by your genes.

Nutrition

The quality, quantity, and types of foods you eat directly impact your weight. A balanced diet rich in whole foods, lean proteins, healthy fats, and complex carbohydrates supports healthy weight management.

Physical Activity

Regular exercise helps maintain muscle mass, increases metabolism, and burns calories. Both cardio and strength training play important roles in achieving and maintaining a healthy weight.

Mental Health

Stress, anxiety, and depression can affect eating patterns and activity levels. Mental well-being is closely linked to physical health, including weight management.

Sleep

Quality sleep regulates hunger hormones and metabolism. Poor sleep can lead to increased appetite, cravings for high-calorie foods, and reduced motivation to exercise.

Medical Conditions

Certain health conditions and medications can affect weight. Thyroid disorders, hormonal imbalances, and some medications may influence metabolism and body composition.

Related Tools

Weight Loss Calorie Calculator

Calculate calorie target for healthy, sustainable weight loss.

Use Tool

Weight Gain Calorie Calculator

Determine calorie surplus needed for healthy weight gain.

Use Tool

Body Fat Percentage Calculator

Estimate your body fat percentage using different methods.

Use Tool

Ideal Weight Calculator

Find your ideal weight range based on height and body frame.

Use Tool

Ideal Weight Range by Height and Frame

Height Small Frame Medium Frame Large Frame

Tips for Maintaining a Healthy Weight

Balanced Diet

  • Focus on whole foods including fruits, vegetables, whole grains, lean proteins, and healthy fats
  • Limit processed foods, refined sugars, and excessive salt
  • Practice portion control even with healthy foods
  • Stay hydrated—sometimes thirst is mistaken for hunger

Regular Exercise

  • Aim for at least 150 minutes of moderate aerobic activity or 75 minutes of vigorous activity weekly
  • Include strength training exercises at least twice a week
  • Find activities you enjoy to make exercise sustainable
  • Reduce sedentary time by incorporating movement throughout your day

Lifestyle Habits

  • Get 7-9 hours of quality sleep each night
  • Manage stress through techniques like meditation, yoga, or deep breathing
  • Limit alcohol consumption
  • Avoid smoking and other tobacco products

Monitoring and Support

  • Track your progress but avoid obsessing over the scale—focus on how you feel
  • Consider consulting with healthcare professionals for personalized advice
  • Find a support system—friends, family, or groups with similar health goals
  • Set realistic, sustainable goals rather than seeking quick fixes

Important Disclaimer

This Body Mass Calculator is designed for educational purposes only and is not intended to replace professional medical advice. BMI is just one of many factors to consider when assessing overall health. Individual health conditions, body composition, age, and other factors should be taken into account when interpreting BMI results.

Always consult with healthcare professionals before making decisions about your health based on BMI calculations or implementing significant changes to your diet or exercise routine.