In an unpeeled 8 1/4-inch cucumber weighing approximately 301 g, 286.6 g -- or over 95 percent of its weight -- is water. This results in few calories in a serving of cucumber, with a full cucumber containing only 45 calories. In addition to its minimal caloric content, a cucumber contains less than 1 percent of your recommended daily intake, or RDI, of fat and 4 percent of your daily protein based on a 2,000 calorie per day diet, with only 0.33 g of fat and 1.96 g of protein in a full cucumber.
Eating too many cucumbers may not be bad for you, doing so without eating a balanced diet may be damaging to your health.
