Biography: These formulas just predict the body fat. Unfortunately there is absolutely no one formula that accurately predicts excess fat for the whole population. Differences in age, gender, ethnicity, body size, and fitness level all have a very significant affect about the results. Most scales can are the cause of some of the basic differences like age and gender, but make actual unwanted fat percentage you'll get with a pinch of salt. What does all of this mean in your case?Well, whether extra fat scales measure your "true" unwanted fat percentage or otherwise doesn't matter! As long as they can accurately monitor changes in your whole body composition with time, that's all you need. Your body position, how much water in the body, the foods you eat, skin temperature and recent training can all adversely customize the results of excess fat scales. This is an accurate, reliable, beautiful and value-priced bathroom scale. A no-brainer purchase, IMO. Not only that, Etekcity contains the absolute best customer satisfaction group of service repair shop I've ever addressed. Here's why I say that. We bought our scale last year, and also the product performed flawlessly during 1000s of use cycles. Recently, we became alert to erratic readouts and contacted Etekcity for assistance. They were beneficial, but all suggested fixes failed. We figured that these days, a five year run for just a moderately-priced home consumer product was quite acceptable and made a decision to just give up around the old scale and get a new one. I started taking care of my fitness so wanted a great scale so brought this. I like its appearance a great deal. It shows accurately, I cross checked it by checking my weight within my gym and within my doctor in order that it matches perfectly with all the scale that's there within my doctors office. I like back-light display and design goes perfect during my bathroom. The extra large displays helps, its non-slip materials and tempered glass removes any safety concerns. IT also is sold with lifetime warranty and I love this. It's also really precise and Pretty decent. I only thing which my priority is accuracy this also scale gives me by investing in great look so am pleased with this.