Skip to content
TheCalcUniverse

Protein Calculator

Calculate your daily protein needs based on the evidence-based range of 1.6–2.2 g/kg. Includes per-meal breakdown, MPS optimization, and food equivalent guide.

✓ Tested formula & cited sources Checked against independent sources · Oct 18, 2026 Private: runs in your browser

Choose pounds (lbs) or kilograms (kg) for your body weight

Used to calculate daily protein target in grams per kilogram

Your fitness goal determines the protein range — higher for muscle gain or fat loss

Used to fine-tune your target within the evidence-based range.

Results

Daily Protein (Maintain (0.8–1.2 g/kg))

62–93 g/day · 284 kcal

The low end maintains muscle; the high end supports building it. A dose of about 31 g (0.4 g/kg) per meal is enough to maximally stimulate muscle protein synthesis, so spreading intake across ~3 meals is a sensible pattern (protein above that still counts toward your daily total). Protein also blunts hunger, which helps most on a calorie deficit.

Target (adjusted for training frequency)
71 g/day · 284 kcal · 0.92 g/kg
Per Meal Breakdown
14 g × 5 meals · 18 g × 4 meals · 24 g × 3 meals
Optimal Meal Schedule for Muscle Protein Synthesis
3 meals/day at ~31 g per meal (max 0.4 g/kg/meal)
Daily Food Equivalents
~3 chicken breasts (3 oz) · 12 eggs · 3 whey scoops · 4 servings Greek yogurt (3/4 cup) · 3 servings salmon (3 oz)
Protein as % of Daily Calories (at 2,000 kcal baseline)
14% of 2,000 kcal diet (adjust for your actual calorie intake)

The formula

Protein (g) = Weight (kg) × g/kg factor | 1 g protein = 4 kcal | Max MPS per meal ≈ 0.4 g/kg

MPS
Muscle Protein Synthesis
Leucine
Leucine Threshold
g/kg
Grams Per Kilogram

Worked example — Body Weight 170

Daily Protein (Maintain (0.8–1.2 g/kg)) = 62–93 g/day · 284 kcal

Full explanation ↓

How Protein Calculator Works

Protein (g) = Weight (kg) × g/kg factor | 1 g protein = 4 kcal | Max MPS per meal ≈ 0.4 g/kg

For active people, the International Society of Sports Nutrition (2017) recommends 1.4–2.0 g/kg per day, and the Morton et al. 2018 meta-analysis (Br J Sports Med 52:376) found that protein supplementation added no further resistance-training gains in fat-free mass beyond a total intake of about 1.6 g/kg per day (break point 1.62 g/kg/day, 95% confidence interval 1.03 to 2.20), and its authors note it may be prudent to recommend about 2.2 g/kg for those maximising those gains; the 1.6–2.2 g/kg range used here is drawn from that analysis.

The endurance range of 1.4–1.8 g/kg is a planning range chosen for this calculator, not a quoted guideline; it sits inside the 1.4–2.0 g/kg that the ISSN position stand gives for most exercising individuals. For people who are mostly sedentary the recommended dietary allowance is 0.8 g/kg, which is the floor of the Maintain range here. Higher intakes within the range support muscle gain and preservation during calorie deficits. The body has a per-meal ceiling for muscle protein synthesis (MPS) of approximately 0.4 g/kg.

MPS
Muscle Protein Synthesis — The biological process of building new muscle tissue. Stimulated by resistance training and dietary protein. Has a per-meal ceiling of ~0.4 g/kg.
Leucine
Leucine Threshold — The amino acid trigger for MPS. A meal needs ~2–3g of leucine (found in ~25–30g of quality protein) to maximally stimulate MPS.
g/kg
Grams Per Kilogram — The standard unit for protein recommendations. 1.6–2.2 g/kg is the range this calculator uses for resistance-trained and fat-loss goals, drawn from the Morton et al. 2018 meta-analysis. "Grams per pound" (0.73–1.0 g/lb) is the imperial equivalent.
Protein needs are 1.6-2.2 g/kg per day for active individuals; spread across 3-5 meals

Understanding the Result

The "1 gram per pound of body weight" rule that dominates gym culture is a simplification that overestimates need for most people. The range used here, drawn from the Morton et al. 2018 meta-analysis, is 1.6–2.2 g per kg of body weight (0.73–1.0 g per lb) for people lifting weights. Higher intake (up to 2.2 g/kg) is beneficial during calorie restriction (cutting) where protein's thermic effect and satiety are advantageous.

The key to muscle growth is not just total daily protein but also its distribution: 3–5 meals with ~0.4 g/kg each maximally stimulate muscle protein synthesis throughout the day. Consuming more than ~0.4 g/kg in a single meal has not been shown to add further MPS (the extra still counts toward your daily total). Leucine, a branched-chain amino acid, is the primary trigger for MPS. A meal needs ~2–3g of leucine (found in ~25–30g of quality protein) to maximally stimulate synthesis.

A post-workout meal with 30–40g of protein is the most important feeding window.

How to Use

  1. Enter your weight and unit system.
  2. Select your goal — from maintenance to muscle gain.
  3. Select your resistance training frequency to fine-tune the target within the range.
  4. Review your daily target, per-meal breakdown, and food equivalents for practical planning.
  5. Use the per-meal breakdown to plan your protein distribution across 3–5 meals for optimal muscle protein synthesis.

Frequently Asked Questions

Can I eat too much protein?
For healthy individuals, high protein intake (studied up to 3.3 g/kg) has not been shown to damage the kidneys or liver. However, intakes above 2.2 g/kg provide no additional muscle-building benefit and may displace other nutrients. Individuals with pre-existing kidney disease should consult their doctor.
When should I have protein post-workout?
The "anabolic window" is wider than commonly thought — you have 4–6 hours post-workout, not 30 minutes. However, consuming 30–40g of protein within 2 hours of training is optimal timing. The most important factor is total daily intake, not precise timing.
Is plant protein as effective as animal protein?
Plant protein can be effective but requires more attention to amino acid profiles. Animal proteins (whey, egg, meat) are "complete" — they contain all essential amino acids in ratios that strongly stimulate MPS. Most plant proteins are lower in leucine (the key MPS trigger), lysine, and methionine. To match animal protein effectiveness, combine complementary plant proteins (e.g., rice + pea, soy + wheat) and aim for ~35–40g of plant protein per meal vs. ~25–30g of animal protein. Soy and pea protein isolate score well among plant options, while single sources like wheat or rice protein are less effective for MPS. Overall, a varied plant-based diet with adequate total protein (2.0–2.2 g/kg) supports muscle growth similarly to animal protein.

Common Uses

  • •Muscle building nutrition — use the 1.6-2.2 g/kg range with per-meal distribution (~0.4 g/kg per meal) to maximize muscle protein synthesis throughout the day
  • •Fat loss protein planning — set protein targets at the upper end of the range (2.2 g/kg) during calorie restriction to preserve lean mass and increase satiety
  • •Post-workout nutrition timing — plan 30-40g protein meals within 2 hours of training, taking advantage of the 4-6 hour anabolic window for optimal recovery
  • •Vegetarian and vegan diet planning — ensure adequate plant protein intake with complementary amino acid profiles and higher per-meal targets (~35-40g vs 25-30g animal)

Sources

Was this calculator helpful?
Cite this calculator

TheCalcUniverse. "Protein Calculator — Evidence-Based Daily Intake." TheCalcUniverse, 2026, https://thecalcuniverse.com/health/protein-calculator/. Accessed October 25, 2026.

Embed this calculator on your site

Free to embed. Paste this into any HTML page — it stays up to date automatically.

Open embed ↗

You may also like

Guides that use this calculator