Diet and weight related
Calculate your BMI (Body Mass Index) to find out if you are overweigh, normal weight or underweight. You can also calculate which weight you should have in order to be of a certain category.
Calculate how much calories you spend at rest
Calculate how much calories you burn, while at rest, considering your weight, age etc.
This is a reversed version of the normal BMI calculation. Instead of calculating the BMI you calculate the weight that will provide you with a certain BMI.
What are the odds of you succeeding with your diet? Well, hopefully they are increasing now when you can calculate all the values you need to investigate your weight and diet.