Protein Per Meal Calculator
Maximising muscle protein synthesis (MPS) from each meal requires not just total daily protein but also an adequate dose per meal that crosses the leucine activation threshold. Research supports a target of approximately 0.4 g of high-quality protein per kilogram of body weight per meal to reliably provide the 2-3 g of leucine needed to stimulate MPS. For most adults, this works out to 25-40 g of protein per meal. Spreading total protein intake evenly across 3-5 meals produces better MPS outcomes than consuming the same total protein in one or two large meals. Enter your body weight and number of daily meals to get your per-meal protein target and estimated leucine content.
Protein per meal formula
Minimum per meal (g) = body weight (kg) * 0.4
Even split per meal (g) = daily protein / meals
Leucine estimate (g) = protein per meal * 0.08
The 0.4 g/kg/meal minimum is from muscle protein synthesis research. The even-split figure shows how distributing daily protein across meals compares. Leucine content assumes 8% of protein by weight (high-quality animal protein average).
Practical protein meal planning
- 30 g of protein per meal equates to approximately: 4 large eggs (24 g protein) plus 1 cup Greek yogurt (17 g protein); or 4 oz chicken breast (35 g); or 1 cup cottage cheese (25 g) plus 1 oz almonds (6 g).
- Older adults (65+) may benefit from slightly higher per-meal targets (0.4-0.6 g/kg) due to anabolic resistance, where a greater protein dose is needed to achieve the same MPS response.
- Post-resistance-training meals should aim for the upper range of the per-meal target to maximise acute MPS.
- Plant-based athletes may need to combine complementary plant proteins per meal to ensure adequate leucine (e.g., rice plus legumes).
- Protein shakes between meals can help meet per-meal targets if whole food sources are limited by time or appetite.
Protein per meal calculator: frequently asked questions
How much protein per meal is needed for muscle protein synthesis?
Research suggests that each meal needs to provide sufficient leucine to trigger muscle protein synthesis (MPS). The practical target is 0.4 g of high-quality protein per kg of body weight per meal, providing approximately 2-3 g of leucine. For a 75 kg person, this is about 30 g of protein per meal.
What is leucine's role in muscle protein synthesis?
Leucine is a branched-chain amino acid that acts as the primary trigger for muscle protein synthesis by activating the mTOR signalling pathway. A leucine threshold of approximately 2-3 g per meal is considered necessary to maximally stimulate MPS, regardless of whether it comes from whole foods or supplements.
Does it matter when in the day I eat protein?
Spreading protein evenly across meals throughout the day maximises the total MPS response. Consuming a large protein bolus in one meal does not provide additional MPS benefit over a well-distributed pattern. Post-exercise protein intake (within 2 hours) is particularly important for muscle recovery and adaptation.
Can I eat more than 30-40 g of protein at once?
Yes. While 30-40 g per meal is generally sufficient to maximise MPS, the body can absorb and utilise more protein than this. Larger protein meals may support other bodily functions, slow gastric emptying, and provide a sustained amino acid supply. Consuming more than about 40 g does not proportionally increase acute MPS.
Does protein quality matter for the leucine threshold?
Yes. Animal proteins (whey, eggs, meat, dairy) are generally higher in leucine (typically 8-11% leucine content by weight) than plant proteins (4-8% leucine). You need about 25-30 g of whey to get 2.5 g of leucine, but may need 40-50 g of soy protein for the same amount. The calculator uses an assumed 8% leucine content as a high-quality protein baseline.
Official sources
- NIH Office of Dietary Supplements: Protein Fact Sheet for Health Professionals.
- USDA Dietary Guidelines 2020-2025: DietaryGuidelines.gov.
Reviewed by the CalculatorHub team, edited by James Graham, 15 June 2026. See our methodology.