Protein density per cup is grams of protein in one cup of food. Learn the formula, a serving vs cup table, and how to plan meals when you fill up fast.
Independent researcher. Not a medical professional. This article is about food, not treatment. See how these articles get written.
Protein density per cup is how many grams of protein a food gives you in one cup of volume, and it is the number that counts when stomach room is your limit. By the end of this page you can turn a protein target into cups of a real food and see in a minute whether it fits on your plate.
The free Starter Kit has a printable protein cheat sheet built on this idea. The full ranking of 59 foods lives on the protein density chart.
Labels and most food lists show protein per serving. That works when you can eat a normal plate. It fails when you are full after four bites, because servings are not the same size.
Here is the trap. A serving of chicken breast is 3 oz. A serving of eggs is one egg. A serving of Greek yogurt is a fraction of a cup. You cannot tell which one packs the most protein into the space you have, because the units do not match. Per cup puts them on the same ruler.
The fix is one division:
Protein per cup = grams of protein in the serving / serving size in cups.
Typical figures from BSW Health’s GLP-1 eating guide and Food Network’s dietitian list, converted with the formula above. Treat them as typical ranges. The chart has the single sourced number for each food.
| Food | Typical serving listed | Protein in that serving | Protein per cup |
|---|---|---|---|
| Cottage cheese | 1/2 cup | 13 g | 26 g |
| Greek yogurt | 3/4 cup | 15 to 20 g | about 20 to 27 g |
| Tofu or tempeh | 1/2 cup | 10 to 20 g | about 20 to 40 g |
| Beans or lentils, cooked | 1/2 cup | 7 to 9 g | about 14 to 18 g |
| Chicken breast | 3 oz | 25 to 30 g | no cup figure listed |
| Egg | 1 egg | 6 g | no cup figure listed |
Look at the last two rows. Chicken and eggs are quoted in ounces and counts, so you cannot compare them with the cup foods until you convert. That gap is exactly why a per-serving chart does not help you decide what to eat when room is tight.
On a normal diet you can fix a low-protein food by eating more of it. On a GLP-1 the volume is the limit, so a food at 14 g per cup and a food at 26 g per cup are not close. One needs nearly twice the room.
The targets are not small. Fella Health’s protein guide describes 1.0 to 1.5 g of protein per kg of body weight a day as relevant for people on these medications. A clinical nutrition summary reports ASPEN guidance at 1 to 1.2 g per kg for sedentary adults and 1.5 g per kg for physically active adults, to preserve muscle. A reported goal for many adults is 20 to 30 g per meal across 3 meals.
This is food math, not a prescription. Your own clinician or dietitian sets your target. The math below only shows you whether a plate can carry it.
Do this once with your own numbers. It takes about a minute.
Step 1. Turn your weight into kilograms. Pounds divided by 2.2.
Step 2. Multiply by the range you were given. Example: say you weigh 176 lb. That is 80 kg. At 1.0 to 1.5 g per kg, the range is 80 to 120 g a day.
Step 3. Divide by your meals. 80 to 120 g over 3 meals is roughly 27 to 40 g per meal. If that looks like a lot for your stomach, that is the whole point of the next step.
Step 4. Divide the per-meal figure by the food’s grams per cup. That gives the cups you need.
Now compare that with how much you can actually finish. That last comparison decides everything.
| Your comfortable sitting | What you need to hit 25 g in one sitting | What to do |
|---|---|---|
| 1 cup or more | 25 g per cup or higher | Pick cottage cheese or a dense food from the chart |
| About 3/4 cup | About 33 g per cup | Nothing on the list reaches it, so split into two sittings |
| 1/2 cup | 50 g per cup | Split across more sittings or add a dense protein to a small bowl |
Example: say your comfortable sitting is a half cup. Cottage cheese at 13 g per half cup gives you 13 g per sitting. Two sittings gets you 26 g. That is a workable plan. Trying to force 25 g into one half cup is not.
The rule: when the cups needed are bigger than the cups you can finish, change the food or change the number of sittings. Do not try to eat more volume.
One more detail: cooked and raw volumes differ. Use the number for the form you are actually eating.
If you want the ranked list, start with Best Protein Foods for GLP-1: Ranked by Cup, Not Serving. If you want the target behind the math, read How Much Protein on a GLP-1. If you want the foods that need no stove, see No Cook Protein for Queasy GLP-1 Days.
Grab a measuring cup. Fill it with what you would normally finish at your next meal and write the number down. Then pick one food from the table, divide your per-meal figure by its grams per cup, and see whether the two numbers meet. If they do not, change the food, not the portion.
The free Starter Kit has the printable protein cheat sheet, seven queasy-day recipes and a 30-day tracker for protein and pill timing. It is complete on its own, with no card or account. Get the Free Starter Kit.
It is the grams of protein in one cup of a food. Use it to compare foods on the same volume, which matters when you can only eat a few bites.
Divide the grams of protein per serving by the serving size in cups. For example, 13 g in a half cup is 26 g per cup.
Stomach room is the limit, not calories. Serving sizes differ between foods, so per serving lists do not show which food gives the most protein for the space you have.
A reported goal for many adults is 20 to 30 g per meal across 3 meals. Your own clinician or dietitian sets the target that fits you.
Pick a denser food or spread the protein across more sittings. Do not try to eat more volume than you can finish.
Severe abdominal pain that goes through to your back, vomiting you cannot stop, or an inability to keep fluids down are not food problems. Call your prescriber.
Everything on this page is food, habits, and lifestyle information. Your prescriber sets your medication schedule, including dose and timing.
The protein cheat sheet, seven queasy-day recipes, and the 30-day habit tracker. Printable, and yours for an email address.
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