"How much protein do I need?" is one of the most-searched nutrition questions for a reason: protein is the single most important macronutrient for building muscle, losing fat, and staying strong as you age. But the answer you'll find varies wildly — from the government's 0.8 g/kg minimum to fitness influencers shouting "1 gram per pound." So what's actually right?
This guide gives you clear, evidence-based daily protein targets based on your weight and goal, plus exactly how to hit them. Want your number instantly? Use our free protein calculator — but read on to understand what it's telling you.
How much protein do you need per day?
Your protein needs depend mostly on two things: your body weight and your goal. Here's what the research supports:
The official RDA (Recommended Dietary Allowance) is just 0.8 grams of protein per kilogram of body weight — but this is the minimum to prevent deficiency, not the amount for an active person trying to build muscle or lose fat. For anyone with body composition goals, the real targets are much higher:
- General health / maintenance: 1.2–1.6 g/kg per day
- Fat loss (while preserving muscle): 1.6–2.2 g/kg per day
- Building muscle: 1.6–2.2 g/kg per day
In pounds, the muscle-building and fat-loss target works out to roughly 0.7 to 1.0 grams of protein per pound of body weight — which is where the popular "1 gram per pound" rule comes from. It's slightly more than you strictly need, but it's a simple, safe target.
How much protein to build muscle?
To build muscle, aim for 1.6 to 2.2 grams of protein per kilogram of body weight per day, combined with resistance training. A large review of 49 studies found that muscle gains increased with protein intake up to about 1.6 g/kg per day — beyond that, the extra protein didn't add much for most people.
Here's what that looks like for different body weights:
| Body Weight | Muscle-Building Protein (per day) |
|---|---|
| 60 kg (132 lb) | 96–132 g |
| 70 kg (154 lb) | 112–154 g |
| 80 kg (176 lb) | 128–176 g |
| 90 kg (198 lb) | 144–198 g |
How much protein for weight loss?
When losing weight, protein becomes more important, not less. In a calorie deficit, your body can break down both fat and muscle for energy — and eating enough protein is what tips the balance toward losing fat while keeping your hard-earned muscle.
For fat loss, aim for the higher end: 1.6 to 2.2 g/kg per day. Higher protein during a diet also keeps you fuller, making the calorie deficit easier to stick to. This is why high-protein diets consistently outperform low-protein ones for fat loss in studies.
Why protein matters more than any other macro
Protein does three things no other macronutrient does as well:
- Builds and repairs muscle. Resistance training creates tiny tears in muscle fibers; protein provides the amino acids to repair and grow them.
- Keeps you full. Protein is the most satiating macronutrient, reducing hunger and overall calorie intake.
- Burns more calories to digest. Protein has a thermic effect of 20–30%, versus 5–10% for carbs and 0–3% for fat. Your body literally burns more energy processing protein.
This matters even more as you age. Muscle mass naturally declines after your 30s, and adequate protein plus strength training is the most effective way to slow that decline and stay strong and capable into later life.
Best high-protein foods to hit your target
Reaching 100–150+ grams of protein per day is easier than it sounds with the right foods:
| Food | Protein |
|---|---|
| Chicken breast (100g) | ~31 g |
| Tuna / salmon (100g) | ~25 g |
| Whey protein (1 scoop) | ~25 g |
| Paneer / cottage cheese (100g) | ~18 g |
| Greek yogurt (100g) | ~10 g |
| Lentils / dal, cooked (100g) | ~9 g |
| Tofu (100g) | ~8 g |
| Egg (1 large) | ~6 g |
A practical approach: aim for a palm-sized portion of protein (25–40g) at every meal, plus a protein-rich snack or shake. Spreading protein across the day rather than eating it all in one meal helps with muscle protein synthesis.
Can you eat too much protein?
For most healthy adults, no. Research has found that daily intakes up to 2.0–2.2 g/kg of body weight are safe for people with normal kidney function, and even higher intakes haven't shown harmful effects in healthy people. The "protein damages your kidneys" claim applies mainly to people who already have kidney disease.
That said, if you have a kidney or liver condition, talk to your doctor before significantly increasing your protein intake. And remember — protein still has calories, so eating far more than your target won't speed up muscle gain and could add unwanted weight.
The bottom line
For most people with body composition goals, aim for 1.6 to 2.2 grams of protein per kilogram of body weight per day (roughly 0.7–1.0 g per pound). Hit it consistently, spread it across your meals, and pair it with strength training. That combination is the foundation of nearly every successful muscle-building or fat-loss plan.
Want your exact number? Our free protein calculator gives you a personalized daily target in seconds, plus how many chicken breasts or whey scoops that translates to.