Body Mass Index (BMI)


Your Minumum Proper Weight


Your Maximum Proper Weight

bmi calculator uk

BMI Body Mass Index

The body mass index (BMI) is a measure of your height and weight that applies to adults. It’s important because it helps determine whether or not you’re overweight, which can lead to other health problems in some cases! You may wonder what this means for people who don’t fit into any category? Well, there are three different scales below.

  • 18-25 Normal Weight
  • 25-30 Overweight
  • 30-40 Obesity
  • Above 40 Morbid Obesity

What is BMI and how is it used?

The body mass index, or BMI, is a measure of body fat based on height and weight that applies to both adult men and women. BMI is an inexpensive and easy-to-calculate screening tool for measuring body fat. It is not a diagnostic tool because it does not measure body fat directly, but it is correlated with other measures of body fat. The BMI formula uses weight in kilograms divided by height in meters squared. Belgian statistician Adolphe Quetelet developed this formula in the early 19th century.

A person’s BMI can be calculated by using the following formula:

BMI = weight (in kg) / height2 (in m2).

normal weight = 18.5 – 24.9
overweight = 25 – 29.9
obesity = BMI of 30 or greater
extreme obesity = BMI of 40 or greater

BMI is an important tool that can help you stay healthy by assessing your weight and risk for diseases. High-BMI people are at higher risk of heart disease, stroke or type 2 diabetes – just to name a few! Knowing this information could be the first step in taking steps towards protecting yourself from these ailments so make sure not to miss out on knowing what your numbers say with today’s challenge.

Other ways to assess excess body fatness?

In addition to BMI, there are a number of other ways to assess excess body fatness. Waist circumference is a good indicator of abdominal fat, which is associated with an increased risk of cardiovascular disease and other health problems. Another measure is skinfold thickness, which can be used to estimate body fat percentage. Some specialised imaging techniques can also be used to assess body fatness, such as MRI and DEXA scans. Ultimately, any method that can accurately measure body fatness can be used to assess excess body fatness.

How is BMI calculated manually?

Measurement Units Formula
Metric Kg & meters (or cm)

Metric BMI Formula: weight (kg) / [height (m)]2

Example: Weight = 80 kg, Height = 185 cm (1.85 m)
Calculation: 80 ÷ (1.85)2 = 23.37

Imperial (Pounds and inches)

Imperial BMI Formula: weight (lb) / [height (in)]2 x 703

Example: Weight = 160 lbs, Height = 5’10″ (70″)
Calculation: [160 ÷ (70)2] x 703 = 23