BMI Calculator
Use this calculator to check your body mass index (BMI).
BMI Calculator
Unit type
Height
cm.
Please enter value between 125 and 225.
Weight
kg.
Please enter value between 10.0 and 500.0 ( one decimal ).
Height
ft.
in.
Please enter value between 4.2 and 7.3
Weight
lb.
st.
Please enter value between 22.0 and 1000.0 ( one decimal ).
Calculate BMI
Use this calculator to check your body mass index (BMI), which can be a helpful tool in determining your weight category. Or, use it to calculate your child’s BMI.

BMI Calculator: Understand Your Body Mass Index

What is BMI?

BMI, or Body Mass Index, is a measure of body fat based on height and weight. Learn more about BMI guidelines from the World Health Organization.

Calculate your ideal body weight based on your height, gender, and body frame with our free ideal body weight calculator. Set realistic health and fitness goals today!

How to Use the BMI Calculator

Using our free BMI calculator is quick and easy:

  1. Enter your height (in feet/inches or centimeters).

  2. Enter your weight (in pounds or kilograms).

  3. Click “Calculate” to get your BMI score.

Your result will fall into one of the following categories:

  • Underweight: BMI less than 18.5

  • Normal Weight: BMI between 18.5 and 24.9

  • Overweight: BMI between 25 and 29.9

  • Obese: BMI 30 or higher

Why is BMI Important?

Understanding your BMI can help you:

  • Assess your risk for weight-related health issues like heart disease, diabetes, and high blood pressure.

  • Set realistic fitness and weight management goals.

  • Monitor changes in your body composition over time.

  • For more information, visit the CDC’s BMI page.

Limitations of BMI

While BMI is a useful tool, it doesn’t account for:

  • Muscle mass (athletes may have a high BMI but low body fat).

  • Bone density or body frame size.

  • Distribution of fat (e.g., visceral fat around organs).

For a more comprehensive health assessment, consider consulting a healthcare professional.

Tips for Maintaining a Healthy BMI

  1. Eat a Balanced Diet: Focus on whole foods like fruits, vegetables, lean proteins, and whole grains.

  2. Exercise Regularly: Aim for at least 150 minutes of moderate exercise per week.

  3. Stay Hydrated: Drink plenty of water throughout the day.

  4. Get Enough Sleep: Poor sleep can affect your metabolism and weight.

  5. Monitor Your Progress: Use our BMI calculator regularly to track changes.

Frequently Asked Questions (FAQs) About BMI Calculator

Is BMI accurate for everyone?

BMI is a general guideline and may not be accurate for athletes, pregnant women, or the elderly. It’s best used as a starting point for understanding your health.

What’s the ideal BMI?

A BMI between 18.5 and 24.9 is considered healthy for most adults.

Can children use this BMI calculator?

This calculator is designed for adults. For children and teens, a pediatrician can provide a BMI-for-age percentile.

How often should I check my BMI?

You can check your BMI every few months to monitor changes, especially if you’re working on weight management.

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