Many people wonder if MyFitnessPal is accurate. MyFitnessPal is basically a calorie counter with a few other tricks up its sleeve. It estimates your BMR basal metabolic rate based on your gender, age, weight and height.  It will give you a good target range of how many calories you should intake based on your activity level and your BMR. If you want to maintain your weight, it will give you one target range, if you want to increase or decrease your weight then you will be given a different target range.  If you stay under your calorie intake goal, you will probably lose weight, however it isn’t a given necessarily. MyFitnessPal is very clear that your BMR is just an estimate. You cannot calculate someone’s metabolic rate very accurately by just inputting information. There are other factors involved and really too many for any computer to easily and accurately estimate. That being said, if your activity level is normal to high and you are careful about portions and have a healthy diet, you should see results.