Protein
Calculator
Stop guessing your macros. Calculate exactly how much protein you need every day to maximize muscle growth, preserve lean mass during fat loss, or simply maintain your current physique.
Clinical Insight: The standard RDA for protein is only 0.8g/kg, which is the minimum to prevent deficiency. Optimal intake for active individuals and athletes is significantly higher.
The Science of Muscle Protein Synthesis
Protein is the building block of life. Every cell in the human body contains protein. The basic structure of protein is a chain of amino acids. You need protein in your diet to help your body repair cells and make new ones.
When you exercise, especially resistance training, you create micro-tears in your muscle fibers. Muscle Protein Synthesis (MPS) is the naturally occurring process in which protein is produced to repair muscle damage caused by intense exercise.
Why Goals Change Requirements
If you are in a caloric deficit (losing fat), your body is more prone to breaking down muscle for energy. Therefore, protein needs are actually highest when cutting, not when bulking, to preserve your lean mass.
Complete vs Incomplete Proteins
Not all proteins are created equal. Your body requires 9 “essential” amino acids that it cannot produce on its own. The source of your protein determines its amino acid profile.
Animal Sources
Meat, poultry, fish, eggs, and dairy are considered complete proteins because they contain all 9 essential amino acids in optimal amounts for the human body.
- • Chicken Breast (31g per 100g)
- • Lean Beef (26g per 100g)
- • Greek Yogurt (10g per 100g)
- • Whey Protein (24g per scoop)
Plant Sources
Most plant foods are incomplete proteins (missing one or more essential amino acids). However, eating a varied plant-based diet easily solves this (e.g., rice and beans together form a complete protein).
- • Lentils (9g per 100g cooked)
- • Tofu (17g per 100g)
- • Quinoa (4.4g per 100g cooked)
- • Seitan (75g per 100g)
Protein FAQs & Myths
Clearing up the confusion around protein absorption, kidney health, and timing.
No. In healthy individuals with normally functioning kidneys, a high protein diet is perfectly safe. The kidneys are highly adaptable and designed to filter waste. However, if you have pre-existing kidney disease, you should consult a doctor before increasing protein intake.
Myth. Your body takes longer to digest larger meals. If you consume 60g of protein in one sitting, your digestive system simply slows down to process and absorb the nutrients over several hours. What matters most is your total daily intake, not exact meal timing.
The “anabolic window” is much larger than the 30-minutes previously believed. If you ate a meal containing protein 1-2 hours before working out, amino acids are still in your bloodstream. Aim to consume protein within 2-3 hours after your workout for optimal recovery.
No. Protein alone does not build bulky muscle; intense resistance training coupled with a large caloric surplus does. For most people (especially women), eating high protein will actually result in a leaner, more toned physique because protein increases satiety (making you eat less) and has a high thermic effect (burning calories during digestion).
Hit Your
Goals.
Protein is the most important macronutrient for body composition. Use the calculator to set your target.