Duck eggs are nearly double the size of a chicken egg. As a result, they are 20g larger and are 52 more calories than chicken eggs heartier than chicken eggs because of nutritional value. The extra calories make up the protein, carbohydrate, and fat content of the duck egg. Duck eggs have 0.41g more carbohydrate, 2.97g more protein, and 0.98 more Saturated Fat than chicken eggs per serving. Substitute chicken eggs for duck eggs and taste the difference!