This is a calorie calculator: it counts the calories per gram of proteins, carbohydrates, fats and alcohol. I didn't put fibers, because fibers cannot be digested (they don't add up calories). The charts show the total and the percentages.
Editor's review of Pimp My Meal

This freeware application helps calculate the potential caloric amounts per gram of certain nutrients and compounds, although its appearance and programming are amateurish at best.

Pimp My Meal requires no installation--simply unzip and run the EXE file. Its bland interface lets users input the quantity of proteins, carbohydrates, fats and alcohol to calculate total calories and percentages per gram. Unfortunately, you won't find a Help file or other program information to interpret results. Pimp My Meal helps determine your body mass index, basal metabolic rate, and weight status. It supports both metric and U.S. units of measurement. However, the programmers misspelled the word "pounds" under the Unit menu, which makes the app seem less than professional. Nonetheless, Pimp My Meal is simple enough for anyone, and it's offered free of charge.