BMI Healthy Weight Calculator


Date of Birth



Your Body Mass Index (BMI) is
BMI Chart Your BMI
BMI Chart BMI Chart Your BMI

By keeping your weight within a healthy range, you’ll lower your risk of heart disease, stroke and certain cancers

There are a number of services that Tees Active can help you with your weight loss ranging from:

  • 1:1 Personal Training
  • 10 week free Lite 4 Life weight management course
  • Over 100 fitness classes
  • Monthly or annual memberships

BMI Calculation

Your BMI is calculated as the proportion of your mass to your height squared

The BMI value indicators are as follows: a BMI of 18.5 to 25 may indicate optimal weight; a BMI lower than 18.5 suggests that you are underweight while a number above 25 may indicate that you are overweight; a number above 30 suggests that you are obese (over 40, morbidly obese).

Child BMI Calculation

For children (5 to 20) there are no standard ranges for BMI, instead a BMI percentile is used, which ranks each child against their age peers. The data used in this application was supplied by the WHO's Child Growth Reference.

Being within the first 5th percentile may indicate an underweight child, between the 5th and 85th percentile indicates an optimal weight; over the 85th percentile is an indication that a child is overweight and above 95th percentile is an indication of obesity.

Growth spurts in adolescent children can produce aberrant results, if you have any concerns we recommend consulting with your GP.