Protein Calculator
Calculate your daily protein needs
Protein Multipliers (g/kg)
| Goal | Sed. | Light | Mod. | Active | Extra |
|---|---|---|---|---|---|
General Health | 0.8 | 1.0 | 1.2 | 1.6 | 2.0 |
Muscle Building | 1.1 | 1.3 | 1.5 | 1.9 | 2.3* |
Athletic Perf. | 1.0 | 1.2 | 1.4 | 1.8 | 2.2 |
* Capped at 2.5 g/kg maximum
Protein recommendations are estimates based on current sports nutrition research. Individual needs may vary based on body composition, training intensity, and health conditions. Consult a healthcare professional or registered dietitian for personalized advice.
How Much Protein Do You Actually Need?
The official Recommended Dietary Allowance (RDA) for protein is 0.8 g per kilogram of body weight per day. However, this value represents the minimum amount needed to prevent deficiency in sedentary adults—not the optimal intake for people who exercise regularly or have body composition goals. A growing body of research in sports nutrition suggests that active individuals benefit from significantly higher protein intake, often in the range of 1.2 to 2.2 g/kg depending on training volume and goals.
Understanding Protein Requirements by Activity Level
Exercise increases protein needs in two key ways: it accelerates muscle protein breakdown during training and stimulates muscle protein synthesis during recovery. The International Society of Sports Nutrition (ISSN) position stand on protein and exercise recommends 1.4 to 2.0 g/kg/day for most exercising individuals, with higher intakes up to 2.2 g/kg for those in caloric deficit or pursuing maximal lean mass gains. Sedentary individuals typically do well at 0.8 to 1.0 g/kg, while those engaging in regular resistance or endurance training should aim for the higher end of the spectrum.
Protein Timing and Distribution
Beyond total daily intake, how you distribute protein across meals matters for maximizing muscle protein synthesis. Research suggests that each meal should contain at least 0.25 to 0.4 g/kg of protein—roughly 20 to 40 grams for most people—to reach the leucine threshold of approximately 2.5 grams needed to fully stimulate muscle building. Spreading your intake across 3 to 5 meals per day, rather than consuming most of your protein in a single sitting, appears to produce better outcomes for muscle retention and growth.
Signs You May Not Be Getting Enough Protein
- Slow recovery: Persistent muscle soreness lasting well beyond 48 hours after workouts
- Muscle loss: Declining strength or visible loss of muscle mass despite consistent training
- Hair and nail issues: Brittle nails, thinning hair, or dry skin can signal chronic protein insufficiency
- Frequent hunger: Protein is the most satiating macronutrient—low intake often leads to increased cravings
- Frequent illness: Protein plays a critical role in immune function and antibody production
Common Protein Sources and Their Content
Meeting your daily target is easier when you know which foods pack the most protein per serving. Here are some common sources:
- Chicken breast (cooked, 100g): ~31g protein
- Eggs (1 large): ~6g protein
- Greek yogurt (170g): ~15g protein
- Salmon (cooked, 100g): ~25g protein
- Lean ground beef (cooked, 100g): ~26g protein
- Tofu (firm, 100g): ~17g protein
- Lentils (cooked, 1 cup): ~18g protein
- Whey protein scoop (~30g): ~24g protein