The BMI prime calculator is different from a normal body mass index calculator as it tells precisely by what percentage you are over your upper mass limit.
Knowing the percentage by which you are over your upper mass limit, the calculator then gives you an estimate of how many pounds you should lose to reach a normal weight status.
The application does not require the user to lift a finger as it is easy to install and it can be uninstalled just as easily in the add/remove programs from the control panel.