Hope the following helps you.
BO42SOX has given me the following informative link: www.peanut-institute.org/NutritionBasics.h
And SLENDERCLAIRE has given the following answer:
Peanuts are actually a legume, like a bean, which makes them a vegetable. They are high in protein, also like a bean, but also in fat - unlike a bean.
The nutritional breakdown for raw unsalted peanuts gives 567cals, 16g carbohydrate, 50g fat and 25g protein per 100g. Not sure what the other 9g is! I couldn't find the figures by the ounce but 100g is about 3.5oz.
So the peanuts work out at about 162cals, 4.5g carbs, 14g fat and 7g protein per ounce.
Hope this helps! Mind you even though they are technically a vegetable, I would hesitate to eat them in sufficent quantity to count as one of your 5 a day - unless you are a vegetarian using them as a protein source.