BMI Calculator

This calculator computes your body mass index and rates it appropriately for men, and women. The BMI – an index that has been developed four years ago especially for this calculator – serves for this purpose. It is based on the results of the most comprehensive study* published so far on the BMI and its associated health risks.

Body Mass Calculator

Weight

Unit of measurement *
cm
kg
ft
in
lbs

BMI

Underweight
Healthy
Overweight
Obese

BMI Calculator Facts

BMI CalculatorThe Body Mass Index (BMI) is a widely used measurement to assess the weight status and potential health risks associated with an individual’s body composition. However, it’s important to note that BMI is a simple calculation based on height and weight and does not directly measure body fat percentage. Here are some facts about the BMI calculator:

  1. Formula: The BMI calculator divides an individual’s weight in kilograms by the square of their height in meters. The formula is as follows: BMI = weight (kg) / height^2 (m^2).
  2. Categories: The World Health Organization (WHO) has established the following categories based on BMI ranges for adults:
    • Underweight: BMI < 18.5
    • Normal weight: BMI 18.5 – 24.9
    • Overweight: BMI 25 – 29.9
    • Obesity (Class I): BMI 30 – 34.9
    • Obesity (Class II): BMI 35 – 39.9
    • Obesity (Class III): BMI ≥ 40
  3. Limitations: Although the BMI calculator is a useful screening tool, it has some limitations. It does not take into account factors such as muscle mass, bone density, and distribution of fat, which can affect an individual’s health. For example, athletes with high muscle mass may have a higher BMI despite being healthy.
  4. Children and adolescents: The interpretation of BMI for children and adolescents is age and sex-specific, as growth patterns differ during different stages of development. The BMI-for-age percentile is used to assess weight status in this population.
  5. Health risks: While BMI is associated with health risks, such as cardiovascular diseases and type 2 diabetes, it is not a definitive measure of an individual’s health. Other factors, such as blood pressure, cholesterol levels, and overall lifestyle, should be considered in conjunction with BMI.
  6. Cultural and ethnic differences: The interpretation of BMI can vary among different populations due to variations in body composition, bone density, and genetic factors. Therefore, BMI thresholds for health risks may not be universally applicable.
  7. Body fat estimation: BMI does not provide information about an individual’s body fat percentage. Additional methods, such as skinfold thickness measurements, bioelectrical impedance, or dual-energy X-ray absorptiometry (DXA), are used to estimate body fat more accurately.

It’s important to remember that BMI is a screening tool and not a diagnostic tool. If you have concerns about your weight or health, it’s best to consult with a healthcare professional who can provide a comprehensive assessment based on various factors.