Protein Powders in the USA
Current amazon.com prices in USD, ranked by cost per gram of protein.
Best value right now
- 1$0.028/g$57.99
- 2$0.036/g$37.50
- 3$0.037/g$32.95
- 4$0.041/g$74.98
- 5$0.041/g$68.99
Choose a comparison
ProteinMath updates product prices daily and normalizes different package and serving sizes into one comparable number.
Protein Powders in Canada
Current amazon.ca prices in CAD, ranked by cost per gram of protein.
Best value right now
- 1C$0.044/gC$89.99
- 2C$0.048/gC$27.74
- 3C$0.054/gC$32.37
- 4C$0.054/gC$60.47
- 5C$0.055/gC$69.69
Protein Bars in the USA
Current amazon.com prices in USD, ranked by cost per gram of protein.
Best value right now
- 1$0.028/g$3.96
- 2$0.072/g$17.24
- 3$0.072/g$10.86
- 4$0.078/g$18.69
- 5$0.078/g$18.79
Protein Bars in Canada
Current amazon.ca prices in CAD, ranked by cost per gram of protein.
Best value right now
- 1C$0.068/gC$3.00
- 2C$0.083/gC$3.00
- 3C$0.096/gC$11.47
- 4C$0.117/gC$34.99
- 5C$0.133/gC$15.98
One fair value metric
We divide price by the total grams of protein in each package. That makes products comparable even when scoop and container sizes differ.
Read the methodology →Current prices, not static rankings
Prices and availability are refreshed daily from Amazon for each country. Always confirm the final price with the retailer.
About ProteinMath →📝 From the Blog
How to Compare Protein Powders
Learn what metrics matter when choosing a protein powder
How We Calculate Price Per Gram
Our transparent methodology for comparing protein powders
Active Ingredients: What Actually Matters
Understanding protein powder labels and ingredients
Amino Spiking Explained
How some brands inflate their protein numbers
Protein and Fat Loss
Evidence-based guidance on protein for weight loss
Protein Timing: When to Take Protein
Does timing matter for muscle growth and recovery?
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Frequently Asked Questions
How is price per gram of protein calculated?▼
We divide the total product price by the total grams of protein in the container (servings multiplied by protein per serving). This gives you a fair apples-to-apples comparison regardless of container size or brand.
How often are the prices updated?▼
Prices are updated daily using Amazon's Product Advertising API. However, Amazon prices can change multiple times per day, so always check the current price by clicking through to the product page.
Why is price per gram better than price per serving?▼
Serving sizes vary wildly between brands. One brand might list 20g of protein per scoop while another lists 30g. Price per gram of protein normalizes this so you can see which product actually gives you the most protein for your money.
Do you include protein bars as well as powders?▼
Yes. You can switch between protein powders and protein bars using the product type toggle at the top of the comparison table. Both are ranked by price per gram of protein.
Which countries are supported?▼
We currently support the USA (Amazon.com) and Canada (Amazon.ca) with prices in USD and CAD respectively. Use the store selector to switch between regions.