Calculate your daily protein intake recommendations based on guidelines from ADA, CDC and WHO.
Goal adjusts protein multiplier for muscle gain or fat loss.
Based on given information, the following are the basic protein intake recommendations from multiple authoritative institutions:
American Dietetic Association (ADA): at least -- - -- grams/day
The Centers for Disease Control and Prevention (CDC): -- - -- grams/day (10-35% of daily caloric intake)
World Health Organization safe lower limit: -- grams/day
These values are general guidelines for healthy adults. Individual protein needs can vary based on activity level, age, muscle mass, overall health and specific fitness goals. Athletes, older adults and people recovering from injury may require higher protein intake.
Proteins are organic compounds made up of amino acids linked by peptide bonds. They are one of the three primary macronutrients — along with carbohydrates and fats — that provide the body with energy. Proteins are essential for the growth, maintenance and repair of all body tissues, including muscle, bone, skin, hair and nails. They also function as enzymes, hormones, antibodies and transport molecules.
There are 20 different amino acids used by the human body. Nine of these are considered "essential," meaning they cannot be synthesized by the body and must be obtained from food. Complete protein sources contain all nine essential amino acids in adequate proportions. These include most animal products (meat, fish, eggs, dairy) as well as some plant sources such as soy and quinoa.
This calculator uses three widely accepted standards to estimate protein requirements:
The Mifflin-St Jeor equation is used to estimate basal metabolic rate (BMR), which is then multiplied by an activity factor to determine total daily energy expenditure (TDEE). This caloric estimate forms the basis for the CDC percentage-based protein range.
| Factor | Effect on Protein Requirement | Typical Range (g/kg) |
|---|---|---|
| Sedentary adult | Baseline requirement | 0.8 – 1.0 |
| Endurance athlete | Increased for muscle repair and glycogen support | 1.2 – 1.6 |
| Strength / resistance athlete | Highest for muscle protein synthesis and growth | 1.6 – 2.2 |
| Older adult (65+) | Increased to prevent sarcopenia (muscle loss) | 1.2 – 1.6 |
| Calorie deficit / fat loss | Increased to preserve lean body mass | 1.6 – 2.4 |
| Pregnancy / lactation | Increased for fetal growth and milk production | 1.1 – 1.8 |
| Injury / recovery | Significantly increased for tissue repair | 1.5 – 2.5 |
~31 g protein per 100 g — lean, complete protein, low in fat
~20 g protein per 100 g — rich in omega-3 fatty acids
~10 g protein per 100 g — high in calcium and probiotics
~6 g protein per large egg — highest biological value reference
~9 g protein per 100 g cooked — plant-based, high fiber
~7 g protein per 100 g — versatile plant protein source
~8 g protein per 100 g — complete plant protein
~21 g protein per 100 g — high in healthy fats and vitamin E
Complete proteins contain all nine essential amino acids in the proportions needed by the human body. Animal-based foods such as meat, poultry, fish, eggs, milk and soy products are complete proteins.
Incomplete proteins are low or lacking in one or more essential amino acids. Most plant proteins are incomplete. However, by combining different plant protein sources throughout the day — such as beans and rice, or lentils and whole grain bread — a person can obtain all essential amino acids. This concept is known as protein complementation.
All values provided by this calculator are estimates based on standard population guidelines. Individual protein requirements can vary significantly based on genetics, muscle mass, metabolic rate, hormone levels, kidney function, specific health conditions and medications.
People with kidney disease or impaired renal function may need to restrict protein intake and should consult a healthcare provider. This calculator is for informational and planning purposes only and does not constitute medical or nutritional advice. Always consult with a qualified healthcare provider or registered dietitian before making significant dietary changes.
1. Institute of Medicine. "Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids." 2005.
2. World Health Organization. "Protein and amino acid requirements in human nutrition." 2007.
3. Centers for Disease Control and Prevention. "How much protein do you need?"
4. Academy of Nutrition and Dietetics. "Position of the Academy of Nutrition and Dietetics, Dietitians of Canada, and the American College of Sports Medicine: Nutrition and athletic performance." 2016.
5. Mifflin MD, St Jeor ST, et al. "A new predictive equation for resting energy expenditure in healthy individuals." American Journal of Clinical Nutrition 1990.