Home › Guides › Cheapest whey protein
The cheapest whey protein in Australia right now
We compared the whey proteins sold across the 19 Australian stores we track and ranked them by what you actually pay for the protein inside, not the price on the tub.
Prices checked 26–27 Sep 2026. Prices change often, so check the store before you buy.
Top 10 whey proteins by value
| # | Product | Price | Per 30g protein | Per 100g | |
|---|---|---|---|---|---|
| 1 | Myprotein Impact Lean Whey 1kgat Myprotein | $34.99 | $1.40est. | $3.50 | Buy ↗ |
| 2 | Musashi 100% Whey 2kgat Chemist Warehouse | $77.49 | $1.55est. | $3.87 | Buy ↗ |
| 3 | INC. 100 Dynamic Whey 2kgat Chemist Warehouse | $77.99 | $1.56 | $3.90 | Buy ↗ |
| 4 | Myprotein Impact Whey Protein 250gat Myprotein | $11.99 | $1.92est. | $4.80 | Buy ↗ |
| 5 | Vital Strength Launch Whey Protein 2kgat Chemist Warehouse | $106.79 | $2.07 | $5.34 | Buy ↗ |
| 6 | Protein Supplies Australia Australian Whey 1kgat Protein Supplies Australia | $52.46 | $2.10est. | $5.25 | Buy ↗ |
| 7 | INC. 100 WPI 2kgat Chemist Warehouse | $116.99 | $2.14 | $5.85 | Buy ↗ |
| 8 | Optimum Nutrition Gold Standard Isolate 2.27kgat Chemist Warehouse | $134.34 | $2.27 | $5.92 | Buy ↗ |
| 9 | Optimum Nutrition Gold Standard 100% Whey 4.54kgat Nutrition Warehouse | $280.88 | $2.35 | $6.19 | Buy ↗ |
| 10 | Bulk Nutrients Whey Protein Concentrate 1kgat Bulk Nutrients | $59.00 | $2.36est. | $5.90 | Buy ↗ |
"est." means the store doesn't list protein per serve, so we've used a typical protein content for that type of whey.
Why we rank by protein, not price
A big "70% off" sticker doesn't tell you much. Tubs come in different sizes, and some powders are only 65–70% protein while others are close to 90%. So we work out what 30g of actual protein costs from each tub, which is roughly one shake. That's the fairest way to compare a cheap concentrate with a pricier isolate.
A trial-size tub can be heavily discounted and still cost more per shake than a full-size tub at normal price. That's why a 76% off deal can rank below a 40% off one.
How to pay even less
- Buy the bigger tub if you'll finish it. Price per 100g almost always drops as the size goes up.
- Watch delivery. Most stores charge shipping under $150. Chemist Warehouse and other in-store chains let you pick up for free.
- Check member prices. Some brands, like Musashi, show lower prices once you join their free program.
Compare every protein, live
Set your daily protein and see what each tub costs you per month.