How to use Body Mass Index (BMI) Calculator
It is simple and swift to use our Body Mass Index (BMI) Calculator. Please follow the steps below:
Step 1: Write your weight in pound in the Weight box
Step 2: Write your height in centimetre in Height box
Step 3: Click Check BMI. Here you go! See the results in BMI Value box
How to convert Kilograms (kg) to Pounds (lbs)
Step 1: Write the figure in Kilograms box
Step 2: Hit Check Lbs button
Step: Here you go! See the results!
How to convert Feet to Centimetre
Step 1: Write feet and inches separately in Feet and Inches boxes
Step 2: Hit Check CM button
Step: Here you go! See the results!
What is Body Mass Index (BMI)?
The Body Mass Index (BMI) is a measure that we can use to find out if our weight is healthy or not, by using our height and weight. It is calculated as an individual’s weight, divided by the squire of his/her height in meters (kg/m2). Being overweight or underweight may lead to some health issues and conditions. Therefore, it is very useful to know whether our weight is in healthy proportion to our height. It is worth noting that a healthy and ideal BMI for most adults is in the 18.5 to 24.9 range (NHS, 2022).
According to the World Health Organisation (2022) for adults over 20 years old, BMI falls into one of the following categories:
| BMI | Nutritional status |
| Below 18.5 | Underweight |
| 18.5–24.9 | Normal weight |
| 25.0–29.9 | Pre-obesity |
| 30.0–34.9 | Obesity class I |
| 35.0–39.9 | Obesity class II |
| Above 40 | Obesity class III |
Criticisms of Body Mass Index (BMI)
Certainly, Body Mass Index (BMI) is a good measure; however, it has some limitations. Some experts argue that this measure relies mostly on an individual’s weight and height only. As the measure does not take an individual’s gender, physical activities, or ethnicity into consideration, some health questions may remain unanswered.
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You may also like our Percentage Calculator and Scientific Calculator.
Last update: 11 July 2022
References:
NHS (2022) What is the body mass index (BMI)?available at: https://www.nhs.uk/common-health-questions/lifestyle/what-is-the-body-mass-index-bmi/ (11 July 2022)
WHO (2022) Body mass index – BMI, available at: https://www.who.int/europe/news-room/fact-sheets/item/a-healthy-lifestyle—who-recommendations (accessed 10 July 2022)