How Many Grams of Protein to Eat? | Your Daily Guide

Your protein target depends on your weight and activity level, with a general recommendation of 0.8 grams per kilogram for sedentary adults and 1.2.

You’ve probably seen the flashy headlines: “Eat 150 grams of protein a day” or “All you need is 46 grams.” Those numbers bounce around because protein needs aren’t one-size-fits-all. A couch potato and a marathon runner obviously require different amounts, yet many people still pick a random number and hope it works.

The honest answer is simpler than you think. Your ideal intake scales with your body weight and how often you move. The research gives you a clear range to work from, whether you’re trying to build muscle, lose fat, or just stay healthy. Let’s walk through the math and the science so you can land on the right number for you.

The Baseline: What the RDA Actually Means

The Recommended Dietary Allowance (RDA) for protein is 0.8 grams per kilogram of body weight per day. For a 150-pound (68 kg) person, that’s roughly 55 grams. For a 130-pound (59 kg) person, it’s about 47 grams. The RDA translates to about 56 grams daily for men and 46 grams for women, according to CDC data.

Those numbers are meant to prevent deficiency in sedentary people. They are the floor, not the ceiling. Data from the National Health and Nutrition Examination Survey shows that American men average about 102 grams per day and women about 70 grams — well above the RDA. Most people already eat more than the minimum.

So the RDA is a starting point. If you exercise regularly, have a physically demanding job, or are trying to change your body composition, you’ll need more than the bare minimum.

Why One Number Doesn’t Fit Everyone

It’s tempting to pick a single target like “100 grams” and call it done. But your body’s protein needs shift based on several factors. Here are the main ones that move the needle.

• Activity level: A sedentary person needs 0.8 g/kg. Someone who exercises a few times a week typically needs 1.2–1.6 g/kg. Competitive athletes often require 1.6–2.0 g/kg.
• Age: Older adults lose muscle mass more easily and may benefit from 1.0–1.2 g/kg to maintain strength.
• Health goals: If you’re in a calorie deficit for weight loss, higher protein (1.2–1.5 g/kg) can help preserve lean mass. For muscle gain, the ISSN recommends up to 2.0 g/kg.
• Special stages: Growing children, pregnant women, and breastfeeding mothers need more protein than the standard RDA to support development and milk production.

Your personal range sits somewhere between 0.8 and 2.0 grams per kilogram. The trick is figuring out where you land on that spectrum.

How to Calculate Your Target Range

The simplest approach is to start with your weight in kilograms and multiply by 0.8 for the minimum, then by 1.6 or 2.0 for the upper end. For a 68 kg (150 lb) person, that gives a range of about 55 to 110 grams per day. Per the protein for athletes MSU guide, physically active individuals should aim for 1.2 to 2.0 grams per kilogram — that same 68 kg person would need 82 to 136 grams depending on training intensity.

Another useful shortcut is 0.54 grams per pound of body weight, which OSF Healthcare recommends as a good starting point for most people. That lands a 150 lb person at 81 grams daily, right in the active range.

Most people exercising regularly will find their sweet spot between 1.4 and 1.8 g/kg. You can start at the lower end and adjust based on your energy, recovery, and progress toward your goals.

Spacing Matters: Protein Per Meal and Post-Workout

Total daily intake matters, but how you spread it also affects muscle protein synthesis. Your body uses protein more efficiently when you eat moderate amounts throughout the day rather than cramming it into one meal.

1. Aim for 20–40 grams per meal. Mayo Clinic Health System notes that more than 40 grams in a single sitting may not offer extra benefit. Three meals with 25–30 grams each easily hits most daily targets.
2. Eat protein within two hours after exercise. Mass General Brigham recommends 15 to 25 grams within that window to support muscle recovery. The ISSN suggests 0.25 g/kg of body weight — about 20 grams for a 175 lb person.
3. Don’t skip breakfast. Many people eat very little protein in the morning and a heavy dinner. Spreading it out helps maintain steady amino acid levels and better supports repair throughout the day.

If you’re active, paying attention to meal timing can make your protein intake work harder for you.

Putting It All Together — A Practical Approach

Harvard Health notes in its RDA grams per pound summary that 0.36 grams per pound is the minimum, but most people need more. A practical daily target for an average active person is around 1.6 g/kg — roughly 0.7 grams per pound. That’s 105 grams for a 150 lb person or 140 grams for a 200 lb person.

Here’s a quick reference for common body weights using the 0.8 g/kg minimum and 1.6 g/kg active target.

Whole food sources like chicken breast, eggs, Greek yogurt, lentils, and fish are great ways to hit these numbers. Protein powders can help fill gaps if you’re busy or have higher needs. Focus on quality and variety rather than obsessing over single grams.

The Bottom Line

Start with 0.8 grams per kilogram as your baseline, then scale up to 1.2–2.0 g/kg depending on your activity and goals. Distribute protein across meals and prioritize a serving after exercise. Most people will do well somewhere in the 1.4–1.8 g/kg range.

If you have kidney concerns, specific health conditions, or simply want a plan matched to your training schedule and dietary preferences, a registered dietitian can fine-tune your protein target based on your exact body weight and lifestyle details.