🌍 Meal Size Calculator — Precision & Global Standards
📊 About this tool: The meal size calculator helps you determine optimal portion sizes and calorie distribution across your day based on scientific formulas (Mifflin‑St Jeor) and global dietary guidelines. Whether you live in the USA, Europe, Asia, or Africa, this tool adapts to your metrics, activity, and goals. It provides a dynamic graph, macronutrient guidance, and meal-by-meal recommendations. Use it for weight management, athletic fueling, or healthy everyday eating.
⚙️ 1. Your personal profile
(15% of calories as snack, meals redistribute)
🇺🇸 Factor insights (based on US dietary references & NIH):
✔️ Age/Sex: BMR changes with age; Mifflin-St Jeor equation (validated by ADA) used.
✔️ Weight/Height: Directly affect energy expenditure – US MyPlate encourages portion awareness.
✔️ Activity level: Physical activity multipliers from US Dietary Guidelines (PAL values).
✔️ Goal adjustment: ±500 kcal/day aligns with CDC recommendations for gradual change.
✔️ Snack inclusion: Based on NHANES eating patterns – we provide adaptive distribution.
🌎 Global adaptability: While references follow US DRI, meal sizes work worldwide — from Italian Mediterranean plates to Japanese Kaiseki portions. Use local whole foods.
📈 Advanced meal plan & analysis
⭐ Your total daily energy need (TDEE + goal adjustment)
—
calories per day
🥑 Macronutrient split (Daily Reference)
Protein: –g | Carbs: –g | Fat: –g
Protein: –g | Carbs: –g | Fat: –g
⚡ Meal size flexibility: Each meal shown (calories) adapts to your total energy, goal and snack preference. Based on internationally accepted calorie distribution: breakfast (~20-25%), lunch (~30-40%), dinner (~30-35%) and optional snack (~15%).
📐 Meal size & portion examples (worldwide):
🇺🇸 US: 3oz protein ~ palm size | 🇮🇳 India: 1 katori dal (120 kcal) | 🇯🇵 Japan: 150g rice bowl | 🇧🇷 Brazil: 1 concha of beans. Use the meal calories above to adapt actual portions — calorie density varies, but recommended energy values stay consistent.
🇺🇸 US: 3oz protein ~ palm size | 🇮🇳 India: 1 katori dal (120 kcal) | 🇯🇵 Japan: 150g rice bowl | 🇧🇷 Brazil: 1 concha of beans. Use the meal calories above to adapt actual portions — calorie density varies, but recommended energy values stay consistent.