What does 25 g of protein actually cost?

Last reviewed 2026-08-29. Every figure below was read from the certifier's own listing or report on that date, and each links its source.

Protein powder is priced per pound and consumed per scoop, and the two have very little to do with each other. A tub can be cheap per kilo and expensive per gram of protein — the scoop is large, the protein per scoop is modest, or the tub holds fewer servings than the front of the label suggests. One number settles it.

cost per 25 g protein = price ÷ (protein grams per serving × servings per container) × 25

Every input is printed on the tub: the price, the Protein line of the supplement facts, and Servings Per Container. 25 g is the unit because it is close to one scoop of most powders, so the answer reads as what a serving-sized dose costs regardless of how each brand sizes its own scoop.

A worked example

Garden of Life Sport, Organic Plant-Based Protein, Vanilla carries 30 g of protein per serving and 19 servings, so 30 × 19 = 570 g of protein in the container. At 623.85 NOK, that is 623.85 ÷ 570 × 25 = 27.36 NOK per 25 g of protein.

Prices on this site's protein pages are currently captured from a non-US iHerb storefront, so read the currency as a unit of comparison between these rows rather than as what you would pay.

Three things that move the answer more than the price does

• Servings per container is usually approximate. Labels say “about 15”. Your cost per 25 g is approximate in the same proportion, so read two products within a few percent of each other as a tie.
• Two-scoop servings. Some labels print two columns — one per scoop, one per serving — where the serving is two scoops. One product we checked shows 15 g of protein in the first column and 30 g in the second; take the wrong one and the answer is out by half. Check which column Servings Per Container belongs to.
• Protein per serving varies more than price. Across the products checked here it runs from 20 g to 30 g a serving, a 50% spread — wider than most of the price differences on the shelf.

What this number does not tell you

Cost per 25 g is a price comparison and nothing else. It says nothing about how a powder tastes or mixes, nothing about amino acid profile, and nothing about whether the product was tested at all. A tub with no public test evidence and one with an independent certification sit side by side in the arithmetic, and the arithmetic cannot tell them apart. For that, start with what “third-party tested” actually means, and with what those certifications leave out.

This page restates published testing records with attribution. It makes no health, benefit or treatment claim, and says nothing about whether any product is safe or good for you. A certification record describes tested lots, not a permanent grade.

Nothing on this page earns us anything today: the iHerb links are plain untagged URLs, and no product here carries an Amazon link, for the reasons set out on the main protein page. Full disclosure.

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