Protein Intake Calculator

How Much Protein Do You Really Need?

The RDA (Recommended Dietary Allowance) for protein is 0.8g/kg — but this is the minimum to prevent deficiency, not the optimal amount for active people. Sports nutrition research consistently shows higher intakes are beneficial:

• Morton et al. (2018) — A meta-analysis of 49 studies found that protein intakes of 1.6g/kg/day maximized muscle protein synthesis. Benefits plateaued above this level.
• Helms et al. (2014) — For athletes in a calorie deficit, 2.3-3.1g/kg of lean body mass is recommended to preserve muscle while losing fat.
• ISSN Position Stand (2017) — The International Society of Sports Nutrition recommends 1.4-2.0g/kg for exercising individuals, with up to 3.0g/kg shown to be safe.

Why Protein Matters More When Cutting

When you're in a calorie deficit, your body needs a reason to keep muscle tissue — that reason is protein. Higher protein intake during a cut serves two purposes: it preserves lean muscle mass (so you lose fat, not muscle), and it increases satiety (protein is the most filling macronutrient, helping you feel full on fewer calories).

Protein Distribution: Does Timing Matter?

Total daily protein intake matters more than timing. However, distributing protein evenly across 3-4 meals (20-40g each) appears to be slightly better for muscle protein synthesis than eating most of your protein in one meal. The “anabolic window” myth has been largely debunked — you don't need to chug a shake within 30 minutes of training — but consuming protein within a few hours of exercise is reasonable practice.

Complete vs. Incomplete Proteins

Animal proteins (meat, fish, eggs, dairy) contain all essential amino acids in sufficient quantities. Plant proteins (beans, lentils, tofu, grains) are often lower in one or more amino acids but can be combined for a complete profile. Soy and quinoa are exceptions — they're complete plant proteins. If you eat a varied plant-based diet, you'll get all essential amino acids without needing to combine foods at every meal.

Is Too Much Protein Harmful?

For healthy individuals with normal kidney function, high protein diets (up to 3.0g/kg) have been shown to be safe in multiple studies. The outdated concern that high protein damages kidneys has been thoroughly debunked in healthy populations. However, those with pre-existing kidney disease should consult their doctor before significantly increasing protein intake.