Ideal Protein Intake by Weight: Complete 2026 Guide

The "how much protein per day" question has different right answers depending on whether you're a sedentary office worker, an athlete chasing performance, or someone trying to lose fat without losing muscle. The government's RDA — 0.8 grams per kilogram of body weight — is the floor for survival, not the target for thriving. Most people active enough to ask the question need 1.5-2× the RDA. This guide walks through the actual targets by body weight and goal, with worked examples and the practical decisions about timing and sources that matter once you know your number.

For a personalized target, plug your weight, activity level, and goal into our protein calculator — it produces a recommendation calibrated to your specific situation rather than a generic average.

Baseline RDA vs athletic needs

The Recommended Daily Allowance (RDA) for protein is 0.8 g/kg of body weight (or 0.36 g/lb), set by the Food and Nutrition Board to prevent deficiency. For a 150-lb sedentary adult, that's about 54 grams of protein per day.

The catch: the RDA was calibrated against the minimum amount that prevents nitrogen-balance deficiency in healthy adults — not the amount that optimizes muscle retention, recovery, or body composition. Modern sports nutrition research (ISSN 2017 position stand and the cumulative work of Phillips, Aragon, and others) consistently shows that active adults benefit from significantly higher intakes:

Sedentary adults: 0.8-1.0 g/kg (≈0.4 g/lb)
General fitness exercisers: 1.2-1.6 g/kg (≈0.55-0.7 g/lb)
Strength training, body composition focus: 1.6-2.0 g/kg (≈0.7-0.9 g/lb)
Cutting (fat loss while preserving muscle): 2.0-2.4 g/kg (≈0.9-1.1 g/lb)
Older adults (60+): 1.2-1.5 g/kg minimum to combat sarcopenia (age-related muscle loss)

The pattern: the more you train, the more you weigh, the older you are, or the more aggressively you're cutting calories — the higher your protein needs. The protein calculator handles all four inputs in one pass.

Protein needs by goal

The right protein target shifts depending on what you're trying to accomplish. The three most common goals:

Weight loss with muscle preservation: 2.0-2.4 g/kg (≈0.9-1.1 g/lb of total body weight). Why so high? In a calorie deficit, the body becomes more efficient at breaking down lean tissue. Protein both directly reduces muscle protein breakdown and produces the highest thermic effect of any macronutrient (20-30% of calories burned in digestion vs 5-10% for carbs). For most cutters, 1 gram per pound of body weight is the practical target.

Maintenance with regular training: 1.6-2.0 g/kg (≈0.7-0.9 g/lb). High enough to support recovery from training and incremental muscle gains; not so high that it crowds out other macronutrients. Most maintainer-mode lifters and athletes settle here.

Muscle gain (lean bulk): 1.6-2.2 g/kg (≈0.7-1.0 g/lb). Counterintuitively similar to maintenance — past about 1.6 g/kg, additional protein doesn't accelerate muscle growth (it's just expensive calories). The difference between bulking and maintenance is total caloric surplus, not protein.

Sedentary general health: 1.0-1.2 g/kg (≈0.45-0.55 g/lb). Above the RDA to support satiety, blood sugar control, and lean mass preservation in middle age. Most non-exercising adults benefit from going above the strict minimum.

For paired macro planning (carbs and fats around your protein target), our macro calculator takes your protein target and your daily calorie goal and produces complete macro recommendations.

Worked examples: 140 lb, 180 lb, 220 lb

140-lb woman, moderately active, fat loss goal.

Body weight: 63.5 kg
Target: 2.0-2.2 g/kg = 127-140 g protein/day
Practical target: 130-140 g/day
That's roughly 4-5 protein-rich servings per day (e.g., 6 oz chicken at lunch ≈40g, 6 oz salmon at dinner ≈42g, Greek yogurt with breakfast ≈20g, protein shake post-workout ≈25g, plus some protein from incidental foods)

180-lb man, lifts 4x/week, body recomposition goal.

Body weight: 81.6 kg
Target: 1.8-2.0 g/kg = 147-163 g protein/day
Practical target: 160-170 g/day
That's roughly 5-6 protein-rich servings (e.g., 4 eggs ≈25g + Greek yogurt ≈20g for breakfast, 6 oz turkey ≈40g for lunch, protein shake ≈30g, 8 oz steak ≈55g for dinner)

220-lb man, training for hypertrophy, lean bulk.

Body weight: 100 kg
Target: 1.8-2.0 g/kg = 180-200 g protein/day
Practical target: 190-200 g/day
That's roughly 6-7 servings spread across 4-5 meals — typically requires deliberate planning since incidental dietary protein won't get you there

For people who find these numbers daunting, an honest reframe: hitting 1.8 g/kg is a habit-formation problem, not a willpower problem. The first week feels deliberate; by week three it's automatic. Pair our protein calculator with the calorie calculator for a complete daily intake plan that doesn't leave you doing math at every meal.

Timing throughout the day

The "anabolic window" — the idea that you must consume protein within 30 minutes post-workout — has been substantially relaxed in modern research. The current consensus from sports nutrition meta-analyses:

Spread protein across 3-5 meals rather than loading one or two big servings. Each meal should ideally contain 0.4-0.55 g/kg (≈25-40g for most adults) — the dose that maximally stimulates muscle protein synthesis.

Pre- or post-workout timing matters less than total daily intake. As long as you have a meal containing 30-40g of protein within 4-6 hours of training, the window is wide enough that exact timing won't make or break results.

Bedtime protein helps recovery. A 30-40g serving (Greek yogurt, cottage cheese, casein protein) before sleep provides slow-digesting amino acids during the overnight fasting window. Particularly relevant for older lifters and athletes in heavy training blocks.

Skipping meals reduces total intake. The biggest enemy of hitting your protein target isn't bad timing — it's missing a meal because you got busy. People who hit their targets consistently usually have 2-3 protein-anchor meals per day they don't skip.

Protein sources comparison

Not all protein sources are equal in completeness, digestibility, or practical convenience. The 2026 hierarchy:

Animal sources (complete amino acid profiles, high digestibility):

Chicken breast: ~30g per 100g cooked
Turkey breast: ~29g per 100g cooked
Lean beef: ~26g per 100g cooked
Salmon: ~25g per 100g cooked
Eggs: ~6g per large egg (whites only: ~3.6g per egg)
Greek yogurt (plain, 0% fat): ~10g per 100g
Cottage cheese: ~11g per 100g

Plant sources (often incomplete; pair to complete the amino acid profile):

Tofu (firm): ~17g per 100g
Tempeh: ~19g per 100g
Lentils (cooked): ~9g per 100g
Black beans (cooked): ~9g per 100g
Quinoa (cooked): ~4g per 100g (one of the few complete plant proteins)
Seitan: ~25g per 100g (highest plant-protein density)

Supplements (efficient, not magic):

Whey protein: ~24g per 30g scoop, fast-digesting, strongest research base
Casein protein: ~24g per 30g scoop, slow-digesting, ideal pre-bed
Plant-based blends (pea + rice): ~20-24g per 30g scoop, complete amino profile when blended

For vegetarians and vegans hitting protein targets, the practical move is anchor meals around tofu, tempeh, seitan, lentils, and supplemental plant blends. For omnivores, hitting 1.8 g/kg without supplements is achievable but requires planning meals around 30-40g protein anchors.

FAQ

Q: Can you eat too much protein? For healthy adults with normal kidney function, daily intakes up to 3-4 g/kg have been studied without identified harm. The bigger practical risk is displacement: protein-heavy meals can crowd out fiber, fruits, vegetables, and healthy fats. Aim for protein as a foundation, not a monoculture.

Q: How much protein do older adults need? Adults over 60 should target 1.2-1.6 g/kg minimum to combat age-related muscle loss (sarcopenia), with higher intakes (1.6-2.0 g/kg) for older adults engaged in resistance training. Protein needs increase with age, not decrease, because protein utilization efficiency drops.

Q: Is plant-based protein as good as animal protein? Per gram of protein, animal sources are more efficient — higher digestibility (~95% vs ~85% for plant proteins) and complete amino acid profiles. Plant-based eaters can hit identical protein targets but typically need 10-20% higher total intake to account for digestibility differences. Combine multiple plant sources (e.g., rice + beans, hummus + pita) to ensure complete amino acid coverage.

Q: How does protein interact with fat loss? High protein intake supports fat loss in three ways: it preserves lean muscle in a calorie deficit (so you lose fat, not muscle), it has the highest thermic effect of any macro (you burn 20-30% of protein calories during digestion), and it produces strong satiety. Most successful cutting plans hit 2.0-2.4 g/kg protein.

Q: How do I track protein intake without it taking over my life? Two practical approaches: (1) Hit a 30-40g protein anchor at every meal, eyeball-portion the rest; (2) Use a tracking app for 1-2 weeks to calibrate, then go off-app once you internalize what 30g looks like across your common foods. Most successful long-term trackers do option 2 — calibrate, then run on autopilot.

The Short Version

For most active adults, the right protein target is 1.6-2.0 g/kg of body weight per day (or roughly 0.7-0.9 g per pound). For fat loss with muscle preservation, push toward 2.0-2.4 g/kg. Spread it across 4-5 meals at 30-40g each. Use our protein calculator for your personalized target, our macro calculator to balance with carbs and fats, and our calorie calculator for the total energy frame. The RDA is the survival floor; modern research consistently lands above it for anyone who exercises, ages, or values body composition.