Eating two passion fruits only provides 35 calories. Eating foods like passion fruit that are low in calories but high in nutrients can be a healthy way to eat foods. Passion fruit is a good source of nutrients, especially fiber, vitamin C and are the values for a single, small fruit that contains only 17 calories. Consider the texture of the passion fruit's skin. It is good to remember that while you may want to buy clean passion fruits, it really doesn't matter as you only eat the flesh (or inside) of the fruit.