How Much Protein Do I Need Per Day? (By Weight, Age & Activity)
The government just told everyone to eat way more protein. The 2025-2030 Dietary Guidelines, released January 2026, bumped the recommendation from 0.8 grams per kilogram of body weight to 1.2-1.6 g/kg. That's a 50-100% increase. If you've been following the old number, you've probably been undereating protein for years.
Calculate Your Protein Target
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Use the Macro CalculatorThe New Protein Recommendations (2026)
The 2025-2030 Dietary Guidelines now say adults should eat 1.2-1.6 grams of protein per kilogram of body weight per day, or roughly 0.5-0.7 grams per pound. Weigh 150 pounds? That's 81-109 grams daily. The old number (0.8 g/kg, about 54 grams for that same person) was the bare minimum to avoid deficiency. It was never meant to be optimal.
The change reflects years of research showing that higher protein helps you keep muscle, stay fuller, and maintain a healthier metabolism, especially past 40 and if you exercise. The irony: most Americans already eat in this range without even trying. Stanford's Christopher Gardner pointed that out. The old guideline was just weirdly low.
Daily Protein Needs by Body Weight
| Body Weight | Minimum (1.2 g/kg) | Upper Range (1.6 g/kg) | Active/Strength (2.0 g/kg) |
|---|---|---|---|
| 120 lbs (54 kg) | 65 g | 87 g | 109 g |
| 140 lbs (64 kg) | 77 g | 102 g | 128 g |
| 150 lbs (68 kg) | 82 g | 109 g | 136 g |
| 170 lbs (77 kg) | 92 g | 123 g | 154 g |
| 180 lbs (82 kg) | 98 g | 131 g | 164 g |
| 200 lbs (91 kg) | 109 g | 146 g | 182 g |
| 220 lbs (100 kg) | 120 g | 160 g | 200 g |
The "Active/Strength" column reflects research supporting 1.6 to 2.2 g/kg for people who regularly lift weights or do intense exercise. 2.0 g/kg is a practical middle ground for this group.
Protein Needs by Age and Activity
Under 40, not very active: 1.2 g/kg is the new floor. Most people already hit this without thinking about it. If you eat a normal diet with some meat, eggs, or dairy, you're probably fine.
Over 40: This is where it starts mattering. You lose 3-8% of muscle mass per decade starting around 40-50 (sarcopenia). The International Society of Sports Nutrition and multiple geriatric nutrition reviews recommend at least 1.2 g/kg, with 1.6 g/kg or higher for those who exercise. Protein becomes increasingly important for maintaining independence, bone density, and metabolic health with age.
Active adults and athletes: 1.2-2.0 g/kg depending on what you do. Runners: 1.2-1.4. Lifters: 1.6-2.2. Going above 2.2 doesn't seem to help, despite what fitness influencers claim.
Pregnant: Needs go up to about 1.1 g/kg, or 75-100 grams/day. You're literally building another human. The Pregnancy Weight Calculator tracks total recommended weight gain by trimester.
How to Hit Your Protein Target
Simplest approach: aim for 25-40 grams at each meal. Your body can only use about 30-40 grams for muscle building at a time, so spreading it out beats dumping 100 grams at dinner. Add a protein-heavy snack if you're still short.
Protein Content of Common Foods
| Food | Serving Size | Protein |
|---|---|---|
| Chicken breast | 4 oz (cooked) | 31 g |
| Salmon | 4 oz (cooked) | 25 g |
| Ground beef (90% lean) | 4 oz (cooked) | 22 g |
| Greek yogurt | 1 cup | 15-20 g |
| Eggs | 2 large | 12 g |
| Cottage cheese | 1/2 cup | 14 g |
| Lentils | 1 cup (cooked) | 18 g |
| Tofu (firm) | 1 cup | 20 g |
| Black beans | 1 cup (cooked) | 15 g |
| Peanut butter | 2 tbsp | 7 g |
| Protein powder (whey) | 1 scoop | 20-25 g |
Sample Day: 120g Protein
Breakfast: 2 eggs + 1 cup Greek yogurt + berries = 27g protein
Lunch: 4 oz grilled chicken + mixed greens + quinoa = 36g protein
Snack: 1/2 cup cottage cheese + almonds = 18g protein
Dinner: 5 oz salmon + roasted vegetables + rice = 35g protein
Total: 116g protein from whole foods, no supplementation needed.
Animal vs. Plant Protein
Animal protein (meat, eggs, dairy) is "complete" -- all 9 essential amino acids in the right proportions. Plant protein (beans, lentils, nuts, tofu) is usually low in one or two, but eating a variety throughout the day fills the gaps. You don't need to perfectly combine proteins at every single meal. Both Harvard and the American College of Cardiology note that plant-heavy protein diets tend to be better for your heart than diets heavy in red and processed meat.
Do You Need a Protein Supplement?
If you're hitting your target with real food, you don't need a supplement. Period. Protein powder is a convenience tool, not a requirement. It's most useful if your target is above 150g/day, you don't have time to cook, you're older and your appetite has shrunk, or you're cutting calories but need to keep protein up. If you do buy one, look for minimal sugar, third-party testing (NSF Certified for Sport or Informed Sport), and at least 20g protein per serving.
Fair warning: Consumer Reports found that over two-thirds of protein powders they tested had more lead than recommended limits. Third-party tested products are worth the extra few bucks.
FAQ
For more on this topic, see our calorie guide.
For more on this topic, see our intermittent fasting guide.
Sources
2025-2030 Dietary Guidelines for Americans: Federal protein intake recommendations
Stanford Medicine: Expert analysis of the new protein guidelines
Harvard T.H. Chan School of Public Health: Protein quality and cardiovascular health
American College of Cardiology: Cardiovascular implications of dietary protein sources
Mayo Clinic Health System: Protein needs by age and activity level
Related Tools
Get your personalized macronutrient split with the Macro Calculator, find your calorie needs with the Calorie Calculator, or check your body composition with the BMI Calculator.