· Body Mass Index (BMI)   What kind of shape are you really in? Calculate your Body Mass Index (BMI), a ration of weight to height that's useful as a measure of general fitness · Calorie Counters for Activities   Find out how many calories you burn doing work everyday things, or what treat you can earn when you walk a mile or take an aerobics class · Basal Metabolism Rate (BMR)    BMR measures internal activity-the amount of energy used to maintain the bodily functions required to sustain life · Target Heart Rate   Measure your heart beat to caculate your healthy heart rate zone. · Body Fat Calculator   Estimate the percentage of your body fat · Glycemic Index   Ranks carbohydrates based on their immediate effect on blood glucose (blood sugar) levels.