# The Science of BMI: How It’s Measured and What It Reveals About Your Health

Body Mass Index, or BMI, is an incredibly useful metric for assessing your health and measuring your progress over time. But what is BMI, and how is it measured? In this article, we’ll explore the science of what BMI is, how it is measured, and what it reveals about your physical health and wellbeing.

### What is BMI?

BMI is a measure of body fat based on height and weight. It is calculated using a simple formula that takes into account both your weight and your height. This results in a single number, which indicates whether your weight is healthy for your height.

### How is BMI Calculated?

The formula used to calculate BMI is fairly simple: your weight (in kilograms) divided by your height (in metres) squared. This equation results in a single number – your BMI – that corresponds with a range of numbers which correspond with different levels of health.

BMI is an important indicator of overall health. It is used to assess whether you are at a healthy weight for your height, as well as to monitor changes in weight over time. A higher BMI is associated with higher risk for a range of health conditions, ranging from diabetes to heart disease. A BMI of 18.5 to 24.9 is considered healthy, while anything above 25 is considered overweight.

### Key Takeaways

BMI is a measure of body fat based on height and weight. It is calculated using a simple formula that takes into account both your weight and height. What your BMI number reveals about your health depends on where it lies within the BMI range – higher numbers are associated with higher health risks.

### What is the ideal BMI range for optimal health?

The ideal BMI range for optimal health is from 18.5 to 24.9.

Within this range, you are considered to be at a healthy weight. If your BMI falls outside of this range, it may indicate an increased risk for health issues and you may want to speak with your doctor.