BMI
CALCULATOR

BMI (Body Mass Index) is a measure that evaluates whether a person has a healthy weight based on their height and weight. It is calculated using the formula BMI = weight (kg) / height² (m²) and classifies individuals into categories like underweight, normal, overweight, or obese. Maintaining a healthy BMI reduces the risk of lifestyle diseases like diabetes and heart problems. Factors like age, muscle mass, and body composition also influence BMI. Use our BMI calculator to check your health status and achieve your fitness goals!
How to use BMI Calculator?
Enter Weight:
-
Start by entering your current weight. You can input this in either kilograms (kg) or pounds (lbs). Ensure you select the unit system that matches the input field.
Enter Your Height:
-
If using the metric system, enter height in centimeters (cm).
-
If using the imperial system, input height in feet and inches.
Select Your Units:
Choose the unit system you want to use:
-
Metric: Kilograms (kg) for weight and centimeters (cm) for height.
-
Imperial: Kilograms (kg) for weight and feet/inches (ft/in) for height.
View Your BMI:
The calculator will display your BMI score. This score helps determine whether your weight is within a healthy range.
BMI Category:
Based on the result, you’ll see which category your BMI falls into:
-
Underweight
-
Normal weight
-
Overweight
-
Obese
What does BMI mean and how is it calculated?
BMI (Body Mass Index) is a numerical value derived from an individual's weight and height. It helps assess whether a person is underweight, at a healthy weight, overweight, or obese. BMI is calculated using the formula:

The resulting number is then categorized into one of the following ranges:
-
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
How accurate is the BMI calculator?
BMI is a simple and widely-used tool, but it has limitations. While it provides a general idea of whether an individual is underweight, normal weight, overweight, or obese, it doesn't account for variations in body composition, such as muscle mass, bone density, or fat distribution. For example, athletes with high muscle mass may have a high BMI but low body fat, and people with low muscle mass may have a normal BMI but higher body fat. Therefore, BMI is best used as a screening tool, but it may not fully represent an individual's health status. Additional measurements, such as waist circumference, body fat percentage, or consulting a healthcare provider, can offer a more complete picture of health.
Can I use the BMI calculator for both adults and children?
Yes, BMI calculators can be used for both adults and children, but the interpretation of results differs. For adults, BMI is simply a number that falls into the categories of underweight, normal weight, overweight, or obese. However, for children and teenagers, BMI is interpreted differently. Since children’s bodies are still developing, BMI percentiles are used instead of the standard BMI ranges. These percentiles consider age and gender to compare a child’s BMI with that of other children of the same age and sex. A child’s BMI can fall into categories like underweight, healthy weight, overweight, or obese, based on their percentile.
What is the ideal BMI range?
The ideal BMI range for adults is between 18.5 and 24.9, which is considered a healthy weight. Here's a breakdown of BMI categories:
​
-
Underweight: A BMI of less than 18.5
-
Normal weight: A BMI between 18.5 and 24.9
-
Overweight: A BMI between 25 and 29.9
-
Obese: A BMI of 30 or above
It’s important to note that the “ideal” BMI for some people may vary based on factors such as muscle mass, body type, and overall health. A healthcare professional can provide a more personalized interpretation of your BMI.
How do I interpret my BMI result?
Once you calculate your BMI, you can interpret it according to the following categories:
​
-
Underweight (BMI less than 18.5): May indicate malnutrition or a higher risk of health problems related to being too thin. It is important to consult a healthcare provider for guidance.
-
Normal weight (BMI between 18.5 and 24.9): Considered a healthy weight. This range is associated with a lower risk of chronic diseases and is ideal for overall health.
-
Overweight (BMI between 25 and 29.9): Indicates that a person may have excess body weight, which could increase the risk of developing conditions like heart disease, diabetes, and high blood pressure.
-
Obese (BMI 30 or higher): Obesity is associated with a higher risk of serious health conditions, such as heart disease, stroke, diabetes, and certain cancers. Consulting a healthcare professional for weight management advice is recommended.
Can BMI help me with weight loss or health planning?
Yes, BMI can be a useful starting point for weight loss or health planning. If your BMI falls into the overweight or obese category, it can act as a prompt to make lifestyle changes, such as adopting a healthier diet and exercise routine. While BMI alone cannot provide a comprehensive assessment of your overall health, it helps to identify individuals who may be at risk of health problems due to excess weight. For people with a BMI in the normal range, it can be an indicator that they are maintaining a healthy weight. However, BMI should be complemented with other measurements and discussions with a healthcare provider to develop a personalized plan for weight management and health optimization.
Remember, BMI is just a guide. For personalized health advice, consult with a healthcare professional!