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BMR/BMI Calculator

You use energy no matter what you’re doing, even when sleeping. The BMR Calculator will calculate your Basal Metabolic Rate (BMR); the number of calories you’d burn if you stayed in bed all day. If you’ve noticed that every year, it becomes harder to eat whatever you want and stay slim, you’ve also learnt that your BMR decreases as you age. Likewise, depriving yourself of food in hopes of losing weight also decreases your BMR, a foil to your intentions. However, a regular routine of cardiovascular exercise can increase your BMR, improving your health and fitness when your body’s ability to burn energy gradually slows down.
Body mass index (BMI) is used to estimate your total amount of body fat. It is calculated by dividing your weight in kilograms by your height in metres squared (m2). Differences in BMI between people of the same age and sex are usually due to body fat. However there are exceptions to this rule, which means a BMI figure may not be accurate. BMI calculations will overestimate the amount of body fat for:
  • Body builders
  • Some high performance athletes
  • Pregnant women.

BMI calculations will underestimate the amount of body fat for:

  • The elderly
  • People with a physical disability who are unable to walk and may have muscle wasting.BMI is also not an accurate indicator for people with eating disorders like anorexia nervosa or people with extreme obesity.

BMI is not the best measure of weight and health risk. A person’s waist circumference is a better predictor of health risk than BMI.