BMI Calculator

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Your BMI

24.91

Normal weight

  • Underweight
  • Normal Weight
  • Overweight
  • Obesity
Photo of calculator author Wes NolteCreated by Wes Nolte.Last updated Jan 24, 2025.

What is the BMI Calculator?

The BMI Calculator helps assess your Body Mass Index (BMI), which is a measure of body fat based on height and weight. As shown in the chart below, BMI values are calculated by combining your height and weight measurements to determine which health category you fall into. It's a simple yet effective tool widely used to identify weight categories that may lead to health problems.

A tabular chart showing BMI values based on height and weight

While BMI is not a perfect measure of health, it provides a quick snapshot of your weight relative to your height and can highlight potential risks associated with being underweight, overweight, or obese. The color-coded chart makes it easy to find your BMI and understand which category you fall into based on your measurements.

How to Use the Calculator

Using the BMI Calculator is straightforward. Simply enter your height and weight, and the tool will calculate your BMI instantly. Additionally, you can input your age and sex for a more tailored interpretation of your results.

For the most accurate results, use your current and consistent measurements. If your BMI falls outside the normal range, consider consulting a healthcare provider to better understand your health.

BMI Categories

BMI categories help to understand the range of body weight. Here are the categories:

  • Underweight: BMI less than 18.5
  • Normal weight: BMI 18.5–24.9
  • Overweight: BMI 25–29.9
  • Obesity: BMI 30 or greater

These categories are helpful in identifying potential health risks and taking necessary steps towards a healthier lifestyle.

Limitations of BMI

While BMI is a useful tool, it has limitations. It does not account for muscle mass, bone density, overall body composition, and racial and sex differences. For example, athletes with high muscle mass may have a high BMI but not an unhealthy amount of body fat.

It’s important to use BMI as one part of a broader health assessment, alongside other factors like waist-to-hip ratio, diet, physical activity, and overall wellness.

Why Monitor Your BMI?

Monitoring your BMI can help you maintain a healthy weight, which is crucial for reducing the risk of chronic conditions such as heart disease, diabetes, and hypertension. It also encourages better awareness of your physical health and promotes proactive lifestyle adjustments.

Regularly checking your BMI, especially during life stages like menopause or aging, can help you better understand how your body changes over time and adapt accordingly.

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