If you weigh 200 pounds, you need somewhere between 73 and 182 grams of protein per day, depending on how active you are and what your body is doing. That’s a wide range because a sedentary office worker and a competitive powerlifter have very different demands. Your activity level, age, and goals (losing fat, building muscle, or just staying healthy) determine where you fall on that spectrum.
A 200-pound person converts to about 91 kilograms, which is the unit most protein guidelines use. Every recommendation below is calculated from that number.
Protein Needs by Activity Level
The baseline recommendation for a healthy adult with minimal physical activity is 0.8 grams of protein per kilogram of body weight per day. At 200 pounds, that works out to roughly 73 grams. This is the Recommended Dietary Allowance, the amount designed to prevent deficiency in 97% of the population. It’s a floor, not a target for optimal health or performance.
If you’re moderately active (exercising a few times per week, playing recreational sports, or doing physical work), that number climbs to about 1.3 grams per kilogram, or around 118 grams per day. For intense physical activity, the recommendation rises to 1.6 grams per kilogram, which puts you at roughly 145 grams daily.
Here’s how the math breaks down at 200 pounds:
- Sedentary: ~73 grams per day (0.8 g/kg)
- Moderately active: ~118 grams per day (1.3 g/kg)
- Very active: ~145 grams per day (1.6 g/kg)
- Building muscle: 127 to 182 grams per day (1.4–2.0 g/kg)
If You’re Trying to Build Muscle
The International Society of Sports Nutrition recommends 1.4 to 2.0 grams of protein per kilogram of body weight per day for building and maintaining muscle mass. For a 200-pound person, that translates to 127 to 182 grams daily. Most people who lift weights regularly do well somewhere in the middle of that range, around 145 to 165 grams.
The type of training you do matters slightly. Strength and power athletes tend to benefit from the higher end of the range, around 1.6 to 1.7 grams per kilogram (145 to 155 grams at your weight). Endurance athletes, like distance runners or cyclists, typically need a bit less, around 1.2 to 1.4 grams per kilogram (109 to 127 grams). If you’re doing a mix of both, splitting the difference is reasonable.
If You’re Losing Weight
Protein becomes even more important when you’re eating fewer calories than you burn. In a caloric deficit, your body doesn’t just pull energy from fat stores. It also breaks down muscle tissue for fuel, which is exactly what you don’t want. Higher protein intake helps preserve lean body mass during weight loss, keeping you from losing the muscle that drives your metabolism and supports your joints.
If you weigh 200 pounds and you’re actively cutting calories, aim for the upper end of the moderate-to-active range: at least 1.3 to 1.6 grams per kilogram, or roughly 118 to 145 grams per day. Pairing this with resistance training (even two to three sessions per week) makes the biggest difference in holding onto muscle while the scale drops. Protein alone helps preserve lean tissue, but adding strength work is what actually maintains and improves muscle function.
How to Spread It Across the Day
Your body can use protein more efficiently when you distribute it across multiple meals rather than loading it all into one or two sittings. Research on muscle protein synthesis suggests a target of about 0.4 grams per kilogram per meal, spread across at least four meals. At 200 pounds, that’s roughly 36 grams of protein per meal. If you’re aiming for the higher end (closer to 2.0 g/kg/day), that bumps up to about 50 grams per meal across four meals.
This doesn’t mean protein eaten in a large single serving is wasted. Your body still digests and absorbs it. But the signal that tells muscles to repair and grow responds best to repeated doses throughout the day rather than one massive hit. Practically speaking, if you eat three meals and one snack, dividing your daily target roughly evenly across those four eating occasions is a solid approach.
Adjustments for Adults Over 50
Aging changes the equation. After about age 50, you lose muscle mass at a rate of roughly 1% to 2% per year if you’re not actively working to prevent it. This gradual loss, called sarcopenia, affects strength, balance, and metabolic health. Older muscles also become less responsive to protein, meaning you need more of it to trigger the same repair and growth signals that came easily at 30.
If you’re over 50 and weigh 200 pounds, the standard 0.8 g/kg recommendation is likely not enough to maintain your muscle mass. Aiming for at least 1.0 to 1.3 grams per kilogram (91 to 118 grams daily) is a better baseline, and combining that protein with regular resistance exercise produces the greatest improvements in both muscle mass and strength.
How Much Is Too Much
Long-term consumption up to 2.0 grams per kilogram per day (about 182 grams for a 200-pound person) is considered safe for healthy adults. The tolerable upper limit in research is 3.5 grams per kilogram for people who have gradually adapted to high intakes, but that’s an extreme scenario (over 300 grams daily at your weight) with no clear benefit over more moderate amounts.
Consistently eating more than 2.0 grams per kilogram can stress the kidneys over time. High protein intake increases the filtering workload on the kidneys and raises levels of urea and other waste products in the blood. For people with healthy kidneys, this is usually manageable in the short term. But for anyone with reduced kidney function, a single kidney, or a family history of kidney disease, keeping protein below 1.2 grams per kilogram (about 109 grams at 200 pounds) is a safer target. Very high animal protein intake has also been linked to an increased risk of kidney stones.
A Note on Body Composition
All of these calculations use total body weight, but if you’re carrying a significant amount of body fat, your lean mass is what actually needs the protein. A 200-pound person at 15% body fat has about 170 pounds of lean tissue. A 200-pound person at 35% body fat has about 130 pounds of lean tissue. Their protein needs are not identical.
If you’re significantly overweight, using your goal weight or an estimate of your lean body mass as the basis for calculation will give you a more accurate target. For most people at 200 pounds with a moderate body fat percentage, though, the straightforward per-kilogram calculations above will land you in the right range without overthinking it.