Nutritional info on 2" square of cake

LucyGrandma2

I need help figuring out the nutritional counts for a piece of cake on a buffet. It was chocolate with white icing, one layer, about 2" by 2". All I can find lists either a slice that is a fraction of a round cake or a serving size in grams weight, and I don't know how to make the conversion to the size I ate. (If I knew it would be this much trouble I wouldn't have eaten the fool thing!)

neanderthin

Unless we have total calories and volume for the whole cake it's all just guess work. Count it as 250-300 cals and just move on.