How to Compare Protein Powders by Cost per Gram of Protein

For a meaningful price comparison, divide the container’s price by the total grams of protein it contains. Price per kilogram of powder or per scoop is insufficient because protein content and serving sizes vary.

The calculation in two steps

First, calculate the total protein:

Protein per container = net weight in g × protein per 100 g ÷ 100

Then:

Cost per g of protein = container price ÷ total g of protein

Use the information for the specific flavour and the final purchase price, applying the same calculation method to each product.

Comparison example

The following prices are hypothetical.

B has a higher container price but a lower cost for the same amount of protein. The 25 g amount is used solely as a common comparison basis, not as a serving recommendation.

Is the lowest price enough?

The result measures cost, not overall quality. Protein source, allergens, tolerance and the rest of the formulation also matter. Nutritional assessment considers both protein quantity and quality. Jäger et al., 2017

A larger container offers a practical advantage only if it will be used according to its storage instructions and within the appropriate period.

Frequently asked questions

Why is cost per scoop insufficient?
Scoops can represent different weights of powder and different amounts of protein.

Can different flavours be compared?
Yes, using the nutrition information for each flavour.

Is the cheapest option per gram always the best choice?
No. The calculation supports price comparison but does not determine individual suitability.

References

• Jäger R. et al. International Society of Sports Nutrition Position Stand: protein and exercise. 2017. PubMed