🥩 Protein Per Day Calculator
Global evidence-based intake · Activity · Age · Body composition · Medical insights
🔬 Expert insight — beyond generic RDA: After working with elite athletes and metabolic research,
the “one-size-fits-all” 0.8g/kg drastically underestimates needs for active individuals, injury recovery, and aging populations.
Our calculator integrates physical activity multipliers, age-related anabolic resistance, plus clinical adjustments (pregnancy, illness).
The values follow global standards (FAO/WHO, ISSN, USDA Reference) but tailored to YOU. Unique feature: we factor thermic effect & lean mass preservation.
Across all countries — from Tokyo to Berlin to Nairobi — protein quality matters, but quantity remains key. This tool reflects real-world metabolic science.
🌍 Used worldwide | 🇺🇸 USA guidelines + international adaptations
112
grams / day
(g per kg: 1.6)
📊 Your optimal range: 1.2–1.7 g/kg
🍽️ Per meal target (3–4 meals): ~28-37g
🍽️ Per meal target (3–4 meals): ~28-37g
🌏 Factor breakdown (USA & global standards):
- 🏋️ Base RDA (0.8g/kg) – maintenance
- ➕ Activity multiplier applied
- 🎯 Goal & clinical adjustment
Comparison: Your target vs. general population RDA & high active
📘 Frequently Asked Questions
🔹 How does this calculator differ from standard USDA recommendations?
While USDA suggests 0.8g/kg for sedentary adults, modern research (including ISSN and PROT-AGE Study) demonstrates older adults, athletes, and people recovering from illness require up to 2.0g/kg. Our tool integrates lifestyle, clinical nuance, and regional data from Europe, Asia, and America — offering realistic personalization.
🔹 Is high protein safe for kidneys?
For healthy individuals, higher protein intake (up to 2.2g/kg) shows no adverse effects. However our clinical modifier includes a renal adaptation option — always consult a nephrologist if you have pre-existing kidney disease. This respects global medical standards.
🔹 Why does age matter? (seniors need more protein)
Anabolic resistance increases after 60–65 years. To counteract sarcopenia, protein recommendations rise to 1.2–1.5g/kg, sometimes higher. Our algorithm dynamically adjusts baseline with age >65 years, reflecting ESPEN & US geriatric guidelines.
🔹 Does this work for vegetarians/vegans worldwide?
Yes. The calculated protein quantity (grams) is independent of source. However plant-based eaters may benefit from +10% due to digestibility — which you can simulate by choosing “muscle gain” goal. The calculator covers all dietary patterns from India to Brazil.