Online BMI Calculator

Easily calculate your Body Mass Index (BMI) using our free online BMI calculator. Understanding your BMI can help you assess your health status and determine your ideal weight.

Enter Your Information

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kg
ft
in
lbs

Your BMI Result

What is BMI?

Your Body Mass Index (BMI) is a simple calculation used to assess whether your weight is healthy for your height. It is calculated by dividing your weight in kilograms by your height in meters squared (kg/m²). A BMI of 18.5 to 24.9 is generally considered healthy, while a BMI below 18.5 indicates underweight, and a BMI of 25 or higher indicates overweight or obesity.

Use our BMI calculator regularly to track your weight status and stay informed about your health!

How to Use the Online BMI Calculator

Using the BMI Calculator is quick and easy. Follow these simple steps:

  • Step 1: Enter your age in the text box provided.
  • Step 2: Select your gender using the radio buttons.
  • Step 3: Choose your preferred units (Metric Units or US Units) by clicking the respective tab.
  • Step 4: Enter your height and weight in the respective text boxes. Ensure the correct unit is selected.
  • Step 5: Click the "Calculate BMI" button to get your result instantly.

The tool will then display your BMI result along with a color-coded graphical representation, making it easy to understand your body mass status.

BMI Result and What It Means

Once the calculation is complete, the BMI tool will display your result in a color-coded graph. Here's what the different ranges represent:

  • Underweight: A BMI less than 18.5 (represented in blue)
  • Normal weight: A BMI between 18.5 and 24.9 (represented in green)
  • Overweight: A BMI between 25 and 29.9 (represented in yellow)
  • Obesity: A BMI of 30 or higher (represented in red)

The graphical representation ensures that you can easily interpret your BMI result, and it encourages you to take appropriate action based on your health status.

Why Use the Online BMI Calculator?

The Online BMI Calculator is a useful tool for anyone looking to monitor their weight and health. Here are a few reasons why you should use it:

  • Easy to Use: Simple input fields and user-friendly design make it easy to get results.
  • Health Insights: BMI provides an initial gauge of your health, helping you identify potential health risks.
  • Instant Results: Get your BMI calculated instantly with a graphical result that helps you understand the implications of your number.
  • Metric and US Units Support: Choose the unit system you are most comfortable with, whether Metric or US units.

How the BMI Calculator Works

The calculator uses a simple formula to compute your BMI:

                BMI = Weight (kg) / Height (m²)

If you’re using US Units, the formula adjusts slightly to accommodate pounds and inches:

                BMI = (Weight (lbs) / Height (in)²) * 703

Once the calculation is done, your BMI is displayed in a graphical format with a color-coded scale, making it easy to assess your body weight status quickly.

Take Action Based on Your BMI

Your BMI result can help you make informed decisions about your health. Here’s how you can take action:

  • If you're underweight: Consider consulting a healthcare provider for advice on improving your nutrition and overall health.
  • If you're within the normal weight range: Continue your current healthy lifestyle with balanced nutrition and regular physical activity.
  • If you're overweight or obese: Talk to a healthcare professional to develop a personalized plan for weight management and improving your health.

BMI Table for Adults

The following table presents the Body Mass Index (BMI) classifications recommended by the World Health Organization (WHO) for adults aged 20 and above. This categorization helps individuals understand their body weight relative to their height.

Classification BMI Range (kg/m²)
Severe Thinness < 16
Moderate Thinness 16 - 17
Mild Thinness 17 - 18.5
Normal 18.5 - 25
Overweight 25 - 30
Obese Class I 30 - 35
Obese Class II 35 - 40
Obese Class III > 40

BMI Table for Children and Teens

The Centers for Disease Control and Prevention (CDC) provides guidelines for assessing BMI in children and adolescents aged 2 to 20. The table below outlines the BMI categories that indicate weight status for this age group.

Category Percentile Range
Underweight < 5%
Healthy weight 5% - 85%
At risk of overweight 85% - 95%
Overweight > 95%

Frequently Asked Questions (FAQs)

1. What is a normal BMI? A BMI between 18.5 and 24.9 is considered normal. This indicates a healthy weight for your height.

2. Can the BMI tool be used for children? No, the BMI tool is designed for adults. For children and adolescents, growth charts are used to assess health.

3. Should I rely solely on my BMI? While BMI is a useful tool, it’s important to consider other factors such as muscle mass, bone density, and overall health.



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