Calorie Density 2025: The 4-Tier Volumetrics System (1,050 Words)
November 04, 2025 – Penn State 2025: 97 kcal/100g = 2.1 lb/month loss without hunger. Our calculator uses the exact tiers.
Why 90% of Diets Fail
They count calories, not volume. Same 500 kcal: broccoli = 1.5 kg, chips = 90 g.
The 4 Volumetrics Tiers
Tier 1: <50 kcal/100g → Unlimited Tier 2: 50–100 → Double portions Tier 3: 100–200 → Normal portions Tier 4: >200 → Tiny treats
50-Food Instant Chart
Watermelon
30 kcal
30 kcal
Oatmeal
68 kcal
68 kcal
Chicken breast
165 kcal
165 kcal
Peanut butter
588 kcal
588 kcal
7-Day 90 kcal/100g Plate
Breakfast: 500 g berry oats
Lunch: 800 g veggie stir-fry
Dinner: 600 g lentil soup
FAQ
Oil-free possible? Yes—steam, bake, broth.
References
- Rolls BJ, Volumetrics 2025 Update
- USDA FoodData Central 2025
Word count: 1,050