BMI Calculator

What is BMI?

BMI (Body Mass Index) is a tool which can be helpful in indicating whether or not your body weight falls within a healthy range. The BMI formula estimates your body fat based on your height and weight.

If you have concerns about your weight, calculating your BMI can help you to determine whether you may be considered underweight, a healthy weight, overweight or obese and whether you might need to take action to improve your overall health and wellbeing.

BMI Formula

BMI= Weight (kg) / Height (m)²

The BMI formula works by dividing your weight (in kilograms) by your height squared (in metres).

To calculate your Body Mass Index, enter your height and weight and our BMI Calculator will do the rest!  

HEIGHT

cm

WEIGHT

kg

YOUR BMI

UNDERWEIGHT

HEALTHY

OVERWEIGHT

OBESE

Underweight

Your BMI is [bmi]. This means you are considered underweight for your height. Being underweight can be associated with a range of health issues. You may be at risk of various nutrient deficiencies meaning your body is unable to perform at its optimum, impacting its capacity to fight off disease or infection. It may be that there is an underlying health condition which needs to be addressed.

If you are concerned about your weight we recommend discussing your result with your doctor or a dietician for a more personalised assessment and advice tailored to your individual needs.

Healthy

Your BMI is [bmi] which means you are considered a healthy weight. Maintain this healthy BMI score by staying active and keeping a healthy, balanced diet full of nutrient-dense foods.

Overweight

Your BMI is [bmi] which means you are considered overweight. Being overweight is linked to an increased risk for a range of health concerns that impact your personal wellbeing including type 2 diabetes, high blood pressure, and heart disease.

Becoming a healthier weight involves creating positive lifestyle changes including long-term changes in daily eating and exercise habits. Even modest reductions in body weight can result in significant health benefits. Weight loss programs like Bodytrim can help you take control of your body weight.

If you are concerned about your weight we recommend discussing your result with your doctor or a dietician for a more personalised assessment and advice tailored to your individual needs.

Obese

Your BMI is [bmi] which means you are considered obese. Your risk of developing health problems increases as your BMI gets higher.

Becoming a healthier weight involves creating positive lifestyle changes including long-term changes in daily eating and exercise habits. Even modest reductions in body weight can result in significant health benefits. Weight loss programs like Bodytrim can help you take control of your body weight.

If you are concerned about your weight we recommend discussing your result with your doctor or a dietician for a more personalised assessment and advice tailored to your individual needs.

Conditions

The BMI is a useful and relevant measurement for most people over 18 years of age. But it does come with some limitations. This calculation ‘estimates’ rather than directly measure your body fat. The calculation takes into account height and weight, but it doesn’t take into account your body composition i.e, how much of your body weight is fat mass and how much is muscle mass, and the fact that muscle weighs more than fat. This is why a rugby player with a higher proportion of muscle mass is often classified as overweight or obese. Other factors such as age, gender and ethnicity can also influence the relationship between BMI and body fat.

The BMI is a helpful, useful and relevant tool for most people, however, the following groups of individuals should not use the BMI:

Athletes and those with higher proportion of muscle mass.
Growing children and young people.
Elderly who have lost muscle mass.
Pregnant or lactating women.

If you fall under one of the above categories and are concerned about your weight, we recommend you seek advice from your doctor, dietician or midwife. 

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