A hard-boiled egg weighs between 53 and 73 grams, depending on the size classification of the egg. Eggs classified as small are closer to 53 grams when hard boiled, while hard-boiled eggs classified as very large or extra large are 73 grams or more.
Most eggs sold in grocery stores are medium, large or extra large and are priced according to size. If the size classification of the egg is unknown, 63 grams is a reasonable approximation of the weight. The shell of the egg weighs about 5 to 7 grams, with the remainder of the weight divided fairly equally between the white and the yolk.