One standard 10-ounce package of frozen spinach equates to approximately 1 1/2 pounds of fresh spinach. Spinach, frozen and fresh, is a healthy food option that is rich in vitamins and nutrience.
A typical serving of spinach, which is about 3 ounces, is about 7 calories, assuming a person does not add butter, cheese or some other calorie-enriching additive to the vegetable. Spinach is fat-free. Spinach is also cholesterol free and very low in carbohydrates. Spinach comes in at zero on the glycemic scale. Spinach is a good source of niacin, zinc and dietary fiber. Spinach contains antioxidants and is also considered to be an effective anti-inflammatory.