Americans spend over $60 billion a year on diet and weight loss products but the weight often comes right back. That may be because it’s such a hassle to count calories. Now General Electric scientist Matt Webster has developed a calorie counter device which uses microwaves and scales to measure food. It’s simply placed over the plate of food and it shows how much energy is in the contents. “We have the weight of the food and the proportion that’s water and the proportion that’s fat, and from that information, we can estimate calories,” Webster says.