How To Calculate Percent Body Weight Loss. There is also a different case that might appear whenthe initial weight is smaller than the current weight it will return the percentage of weight gain. Weight loss percentage formula.
The most important thing you need to know in order to calculate weight loss is your weight iw before starting the fitness program. Subtract the current weight from the birth weight. This formula can be presented as follows.
We already know that weight loss is a simple difference between two weight measurements taken at different times.
Now divide this figure by the starting weight and you have your percentage. This is the amount of weight lost. All you need to do is input the initial and current weight and you will be given the weight loss percentage. Percentage weight loss is calculated by taking away in pounds your present weight from your starting weight.
