And so you've come in search of the magic number...just how many calories do you need to eat to lose weight? Well you've come to the right place! Watch the video above to learn all you need to know about counting calories and weight loss! By following the math in this video, you will be able to consistently lose weight, and keep it off! First you need to determine how many calories a day your body needs to maintain your weight. If you have no idea, a good starting point is this: one pound of weight takes 100 calories to maintain. So if you weigh 150 pounds, it's likely that just to maintain your current weight, you would need roughly 1500 calories a day! Good luck!