Protein Cost per Gram: How to Work It Out

Protein powders and bars come in so many sizes that the price on the shelf tells you very little on its own. A 1 lb bag, a 5 lb tub and a box of 12 bars each hold a different amount of protein, and the only fair way to compare them is the protein cost per gram. This explainer shows the method step by step, using label numbers from products in our catalog. It does not rank brands by price, and it gives no current prices: prices change often, so check the current price wherever you buy.

How we wrote this: the servings, serving sizes and protein figures below are the label numbers recorded on our product pages, each of which cites its label source. All totals and per-gram figures are our arithmetic from those printed numbers. The one price on this page is an example price, not a current price, written on 2026-10-27; prices vary.

The short answer

Work out how many grams of protein the whole container holds, then divide the price by that number:

Cost per gram of protein = price ÷ (servings per container × grams of protein per serving)

Use the servings and protein grams from the Nutrition Facts or Supplement Facts panel, not the front of the pack, and use the price you will actually pay. If you use more powder than the label serving, the real cost per gram goes up.

Step 1: Find total protein per container

Two label lines give you the total: servings per container and grams of protein per serving. Multiply them. Here is that step for several products in our catalog, using the label numbers recorded on each product page; the totals are our arithmetic:

• Momentous Grass-Fed Whey Protein Isolate: 25 servings × 20 g = 500 g of protein.
• Naked Whey Grass-Fed, Unflavored, 5 lb: 76 servings × 25 g = 1,900 g of protein.
• Naked Pea Protein, Unflavored, 1 lb: 15 servings × 27 g = 405 g of protein.
• Ascent Micellar Casein, Chocolate, 2 lb: 25 servings × 25 g = 625 g of protein.
• Thorne Whey Protein Isolate: 30 servings × 21 g = 630 g of protein.
• Ritual Essential Protein Daily Shake 18+: 15 servings × 20 g = 300 g of protein.

These totals are not a ranking. They only show why a price on its own says little: the Naked Whey tub holds a little under five times as much protein as the Naked Pea bag, so the two prices cannot be compared directly.

If a label does not print servings per container, divide the net weight in grams by the serving size in grams to estimate it, and treat that as your estimate rather than a label figure.

Step 2: Divide the price

Now divide the price by the total grams of protein. A worked example, with an example price, not a current price (prices vary; written 2026-10-27):

• A tub costs an example price of $40.
• Its label lists 25 servings of 20 g of protein, so it holds 500 g of protein.
• $40 ÷ 500 g = $0.08 per gram of protein.

To get a figure that is easier to picture, multiply the cost per gram by a round amount of protein. At $0.08 per gram, 20 g of protein costs $1.60 and 100 g costs $8.00, in this example. Use the same round amount for every product you compare.

For your own comparison, plug in the current price from the shop you use, including any shipping, and redo the sum for each product. A subscription price, a multi-pack or a larger size can each change the result, so compare the options you would really buy.

Step 3: Per scoop vs per serving

A serving and a scoop are not always the same thing, and mixing them up throws the sum off. On our catalog labels:

• One scoop per serving: Momentous lists 1 scoop (25 g) and Ascent lists 1 scoop (36 g).
• Two scoops per serving: Naked Whey and Naked Pea each list 30 g (about 2 scoops), and Orgain Organic Vegan Protein lists 2 scoops (46 g).
• A volume measure: Ritual lists 5 tablespoons or 1/3 cup.

Always use the label’s servings and the protein per serving in the formula. If you count scoops instead, a two-scoop product looks as if it holds twice as many servings as it does, and its cost per gram looks half what it really is.

Step 4: Why scoop weight matters

The servings per container on a label assume you use exactly the printed serving weight. A scoop is a volume measure, and powder can settle, pack down or be heaped, so the amount in your scoop may not match the grams on the panel.

Here is what that does to the sum, using a 5 lb tub as an example. By our arithmetic, 5 lb is about 2,268 g. At the 30 g serving on the Naked Whey label, that is about 76 servings, which matches the 76 on its label. If you heap your scoops and use more than the label serving each time, the same tub gives you fewer servings than the label lists, so each gram of protein you actually use costs more than the label sum suggests.

Two habits keep the sum honest:

• Weigh a serving once. Put your usual scoop or scoops on a kitchen scale and compare with the label grams.
• Compare by grams of protein, not by scoops. Scoop sizes differ between brands.

Protein per gram of powder is a separate check that tells you how much of each serving is protein. Our protein powder buying guide covers that, and our whey isolate vs concentrate vs plant protein explainer explains the protein types behind the numbers. For a worked example with three different serving sizes, see our collagen vs whey protein labels comparison.

Step 5: Protein bars

The same method works for bars, with bars per box in place of servings. Using label numbers from our catalog, the totals are our arithmetic:

• RXBAR Chocolate Sea Salt, 12 bars: 12 bars × 12 g = 144 g of protein per box.
• KIND Dark Chocolate Nuts & Sea Salt, 12 count: 12 bars × 6 g = 72 g of protein per box.
• Larabar Peanut Butter Chocolate Chip, 6 count: 6 bars × 5 g = 30 g of protein per box.

Bars and powders are different foods with different ingredients, so a per-gram figure only compares protein cost, not the whole product. Not every bar is sold mainly for its protein, and a nut or fruit bar with a modest protein figure is not meant to compete with a powder on this sum.

A quick checklist

1. Read servings per container and protein per serving from the panel.
2. Multiply them to get total protein.
3. Divide the current price you will pay by total protein.
4. Check whether a serving is one scoop, two scoops or a volume measure.
5. Weigh your usual serving once.
6. Compare every product at the same round amount of protein.

FAQ

Is cost per serving good enough?

Only if every product has the same protein per serving. Cost per gram of protein removes that difference.

Why don’t you list prices?

Prices change often and differ between shops. The formula works with whatever price you see today.

Does it work for pancake mix?

Yes, as long as you use the dry mix protein figure from the panel. Our protein pancake mix label guide explains the dry mix and “as prepared” numbers.

Talk to your doctor or pharmacist before adding a protein powder or bar if you have an allergy or a health condition, take medication, or are pregnant or nursing.

These statements have not been evaluated by the Food and Drug Administration. The products mentioned are not intended to diagnose, treat, cure, or prevent any disease. Talk to a healthcare professional before starting a supplement.