What Is Calorie Density?
Calorie density is the number of calories (kcal) contained in 100 grams of a food. Foods with low calorie density allow you to eat larger portions while taking in fewer calories, which helps maintain satiety during weight loss. Dr. Barbara Rolls popularized this concept with the Volumetrics diet, which prioritizes foods that fill you up without excess calories.
Calorie Density Categories
| Category | Range | Examples |
|---|---|---|
| Very Low | < 60 kcal/100g | Cucumber, lettuce, tomatoes, watermelon |
| Low–Medium | 60–225 kcal/100g | Chicken breast, brown rice, tofu, apples |
| High | 225–425 kcal/100g | Bread, cheese, pork belly, chocolate |
| Very High | > 425 kcal/100g | Nuts, butter, cooking oil, cookies |
How to Use This in Meal Planning
Build meals around very low and low-density foods such as vegetables and lean proteins, then add moderate amounts of medium-density foods like whole grains. High-density foods can be enjoyed in small portions. For example, pairing pork belly (330 kcal/100g) with lettuce wraps and cucumber effectively lowers the overall calorie density of your meal.
Frequently Asked Questions
No. Calorie density only measures energy content, not vitamins, minerals, or protein quality. A food can be low in calorie density but poor in nutrients, so balance both factors when planning meals.
Yes. Boiling or steaming adds water, which lowers density. Frying absorbs oil and significantly increases density. Always base your calculation on the weight and calories of the food in its prepared form.
The Volumetrics approach recommends keeping your daily average under 150 kcal/100g. This naturally reduces calorie intake while allowing you to eat satisfying meal sizes.