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Online calculate your body mass index (BMI), optimal weight, basal metabolic rate, calories burned with sports, your targer heart rate and useful information on loseing weight.

BMI
The body mass index (BMI), or Quetelet index, is a controversial statistical measurement which compares a person's weight and height. Though it does not actually measure the percentage of body fat, it is a useful tool to estimate a healthy body weight based on how tall a person is. Due to its ease of measurement and calculation, it is the most widely used diagnostic tool to identify weight problem within a population including:underweight, overweight and obesity.

Optimal weight
The most accurate assessment of your ideal weight takes into account the composition of your body - how much of your weight is lean body mass (muscle and bone) and how much is body fat. For optimum health, body fat should be no more than 20% of total body weight for men and 30% for women.

Basal metabolic rate
Your basal metabolic rate, or BMR, is the minimum calorific requirement needed to sustain life in a resting individual. It can be looked at as being the amount of energy (measured in calories) expended by the body to remain in bed asleep all day!
BMR can be responsible for burning up to 70% of the total calories expended, but this figure varies due to different factors (see below). Calories are burned by bodily processes such as respiration, the pumping of blood around the body and maintenance of body temperature. Obviously the body will burn more calories on top of those burned due to BMR.
BMR is the largest factor in determining overall metabolic rate and how many calories you need to maintain, lose or gain weight. BMR is determined by a combination of genetic and environmental factors, as follows: Genetics, Gender, Age, Weight, Body Surface Area, Body Fat Percentage, Diet, Body Temperature/Health, External temperature, Glands, Exercise.

Calories burned with sports
Complete calorie expenditure data and metabolic information for Sports as well as hundreds of other activities.

Target heart rate
The Target Heart Rate (THR), or Training Heart Rate, is a desired range of heart rate reached duringaerobic exercise which enables one's heart and lungs to receive the most benefit from a workout. This theoretical range varies based on one's physical condition, genderand previous training. Below are two ways to calculate one's Target Heart Rate. In each of these methods, there is an element called "intensity" which is expressed as a percentage. The THR can be calculated by using a range of 50%-85% intensity. However, it is crucial to derive an accurate HRmax to ensure these calculations are meaningful (see above).

Lose weight
Weight loss isn't always easy and it helps to learn what weight loss is all about. Get the basics for how to lose weight with diet and exercise tips.