This is a simple, fast and lightweight (ONLY 503 KB) BMR & BMI calculator.

You can input your weight and height either in Metric or English System.

Also has support for French.

The basal metabolic rate, or BMR, is the minimum amount of calories needed to sustain life in a resting individual. It can be looked at as being the amount of energy expended by the body to remain in bed asleep all day!

Body Mass Index (BMI) is an established measure utilized by physicians and health experts to determine weight status as shown below for an adult individual:

below 18.5 underweight
between 18.5 and 25 normal
between 25.1 and 30 overweight
30.1 or higher obese
35 or higher server obese