How much protein do you need per day? Two US answers

Federal sources give two answers. The Recommended Dietary Allowance (RDA) for adults is 0.8 grams of protein per kilogram of body weight per day, which works out to about 56 grams for a 154-pound reference man and 46 grams for a 126-pound reference woman. The 2025–2030 Dietary Guidelines for Americans, released in January 2026, set a higher goal: 1.2 to 1.6 grams per kilogram per day. For a 165-pound adult, that is roughly 60 grams under the RDA and 90 to 120 grams under the new guidelines.

The two numbers are not a typo or a contradiction to resolve by picking one. They come from different documents built for different jobs. Knowing which is which makes it easier to set a target you can actually log against.

What the RDA is designed to do

The RDA comes from the Dietary Reference Intakes (DRIs), the nutrient reference values published by the Food and Nutrition Board of the National Academies. An RDA is defined as the average daily intake that meets the needs of nearly all healthy people, about 97 to 98 percent of them. In other words, it is a sufficiency line. It answers the question "how much protein keeps almost everyone out of shortfall?" rather than "how much protein is ideal?"

The DRI tables list the adult protein RDA as 56 grams a day for men and 46 grams for women, and note that these figures are based on grams of protein per kilogram of a reference body weight. That detail matters: the gram amounts assume a specific body size. If you weigh more or less than the reference adult, the per-kilogram figure is the more useful one. During pregnancy and lactation, the DRI tables list a higher RDA of 71 grams a day.

The same tables also give an Acceptable Macronutrient Distribution Range (AMDR) for adults: 10 to 35 percent of calories from protein, 45 to 65 percent from carbohydrate, and 20 to 35 percent from fat. On a 2,000-calorie day, 10 to 35 percent of calories is 50 to 175 grams of protein. That is a wide band, and it shows that the RDA sits near the bottom of what the National Academies considered an acceptable share of the diet.

What the 2025–2030 Dietary Guidelines changed

The Dietary Guidelines for Americans are published every five years by the U.S. Departments of Agriculture and Health and Human Services. The 2025–2030 edition tells readers to prioritize protein foods at every meal and lists a protein goal of 1.2 to 1.6 grams per kilogram of body weight per day, to be adjusted based on your individual calorie needs.

The guidelines name a broad set of sources: eggs, poultry, seafood, and red meat on the animal side, and beans, peas, lentils, nuts, seeds, and soy on the plant side. Dairy is described as a source of protein as well. The document also suggests baking, broiling, roasting, grilling, or stir-frying instead of deep-frying, and choosing meat without added sugars or a lot of additives.

Two other points in the guidelines are worth knowing. Older adults may need fewer calories but the same or more protein. And people who eat vegetarian or vegan diets are encouraged to include protein-rich foods such as dairy, eggs, beans, and peas, since protein is one of the nutrients those diets can fall short on.

What the consumer document does not do is explain how the 1.2 to 1.6 range relates to the 0.8 RDA, which still stands in the DRI tables. It also does not say which body weight to use for a person whose current weight differs a lot from where they want to be. Those are open questions, and if one of them applies to you, it is a reasonable thing to ask a registered dietitian.

The third number: 50 grams on food labels

If you read Nutrition Facts labels, you may have noticed yet another protein figure. FDA labeling rules set a Daily Reference Value of 50 grams of protein for adults and children 4 and older. That value is what the percent Daily Value for protein is calculated against.

You will not see a %DV for protein on most labels, though. Under the same rule, a manufacturer has to list it only when the package makes a protein claim, or when the food is meant for infants or children under 4. So "10 g protein" on a label with no percentage next to it is normal and does not mean anything is missing.

The 50-gram value is a labeling yardstick, not a personal target. It is useful for comparing products, and less useful for deciding how much you should eat. For more on what label numbers can and cannot tell you, see how accurate nutrition labels are.

Turning grams per kilogram into a daily number

To use any of these figures, convert your weight to kilograms (pounds divided by 2.2) and multiply. The table below does the math for three body weights.

Protein supplies about 4 calories per gram, the same general factor FDA uses for labeling. So 90 grams of protein is about 360 calories, or 18 percent of a 2,000-calorie day. That falls comfortably inside the 10 to 35 percent AMDR. At the high end of the new range for a larger person, 144 grams is about 576 calories. On a 2,000-calorie day that is close to 29 percent of calories, still inside the range, but it leaves less room for carbohydrate and fat. This is the reason the guidelines say to adjust the goal to your calorie needs rather than treat it as a fixed number.

A practical way to read the table: the RDA column is the floor for nearly all healthy adults, and the guidelines' range is what the current federal advice suggests aiming for. Where you land within that range depends on your total calories and what else you eat.

What these numbers don't tell you

All of these values are written for healthy people. The 2025–2030 guidelines do not give protein-specific advice for people with chronic conditions, and instead point readers to a health care professional. If you have kidney disease or another condition where protein intake is managed, follow the plan from your care team rather than a general target.

The numbers also assume you know how much protein you are eating. Most people do not, at least not to the gram. Self-reported intake tends to run below what people actually eat, which is covered in more detail in how far off calorie logs can be. For protein, the practical takeaway is to look at your average over a week or two rather than any single day, and to treat a gap of a few grams as noise.

Finally, a target in grams says nothing about where the protein comes from. The guidelines list both animal and plant foods on purpose, and the gram count alone does not capture the rest of what each food brings to the plate.

Where CaRoot fits

CaRoot is a food logging app that estimates calories and macros, including protein, from a photo of your meal. You can edit the estimate before saving, and if you correct a dish, CaRoot remembers the corrected values for next time. For packaged foods, you can scan a barcode (backed by Open Food Facts) or a nutrition label, or search a food database built from sources such as USDA FoodData Central.

You can set your own calorie and macro goals, so a protein target worked out from the table above can be entered directly. The weekly report shows your average calories and the balance of your macros, which fits the advice to look at a weekly average rather than a single day. CaRoot is free on the App Store with ads, and you can start without an account. An Android version is in development, and you can sign up to hear when it launches on the waitlist page.

Sources

• U.S. Department of Agriculture and U.S. Department of Health and Human Services. Dietary Guidelines for Americans, 2025–2030. 2026. cdn.realfood.gov/DGA_508.pdf
• Food and Nutrition Board, National Academies of Sciences, Engineering, and Medicine. Dietary Reference Intakes (DRIs): Recommended Dietary Allowances and Adequate Intakes, Total Water and Macronutrients, and Acceptable Macronutrient Distribution Ranges (DRI summary tables). nationalacademies.org
• Institute of Medicine. Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids. The National Academies Press, 2005. doi.org/10.17226/10490
• NIH Office of Dietary Supplements. Magnesium: Fact Sheet for Health Professionals (DRI terminology definitions). ods.od.nih.gov
• U.S. Food and Drug Administration. 21 CFR 101.9, Nutrition labeling of food, paragraphs (c)(1)(i)(B) and (c)(7). law.cornell.edu/cfr/text/21/101.9

This article is general nutrition information, not medical advice; if you have a health condition, talk with your doctor or a registered dietitian before changing how much protein you eat.