The cheapest protein powder, by price per kg of protein
A 2 kg tub at 65% protein holds less protein than a 1.5 kg tub at 90%. We divide each price by the protein on the label, so you see what you actually pay for protein. Updated 7 Nov 2026
Australia: cheapest today is Bulk Nutrients Soy Protein Isolate at Bulk Nutrients: A$41 per kg of protein (A$1.24 per 30 g of protein).
United States: cheapest today is NOW Foods Sports, Pea Protein Powder, Unflavored, 7 lbs (3,175 g) at Vitacost: US$35 per kg of protein (US$1.05 per 30 g of protein).
United Kingdom: cheapest today is XL Nutrition XTRA Whey 2kg at Discount Supplements: £29 per kg of protein (£0.86 per 30 g of protein).
| # | Product | A$ per kg of protein | Price | Protein | Link |
|---|---|---|---|---|---|
| 1 | Bulk NutrientsSoy Protein Isolate | A$41A$1.24 per 30 g protein | A$35.001 kg | 85%label | View Bulk Nutrients Soy Protein Isolate at Bulk Nutrients |
| 2 | Bulk NutrientsOrganic Brown Rice Protein | A$46A$1.37 per 30 g protein | A$35.001 kg | 77%label | View Bulk Nutrients Organic Brown Rice Protein at Bulk Nutrients |
| 3 | Bulk NutrientsPea Protein | A$46A$1.38 per 30 g protein | A$35.001 kg | 76%label | View Bulk Nutrients Pea Protein at Bulk Nutrients |
| 4 | Bulk NutrientsEarth Protein - Vegan Protein | A$57A$1.72 per 30 g protein | A$42.001 kg | 73%label | View Bulk Nutrients Earth Protein - Vegan Protein at Bulk Nutrients |
| 5 | Bulk NutrientsLean Earth Protein | A$59A$1.77 per 30 g protein | A$44.001 kg | 75%label | View Bulk Nutrients Lean Earth Protein at Bulk Nutrients |
| 6 | Bulk NutrientsMicellar Casein Protein | A$65A$1.95 per 30 g protein | A$50.001 kg | 77%label | View Bulk Nutrients Micellar Casein Protein at Bulk Nutrients |
| 7 | Bulk NutrientsProtein Matrix+ | A$73A$2.19 per 30 g protein | A$57.001 kg | 78%label | View Bulk Nutrients Protein Matrix+ at Bulk Nutrients |
| 8 | Bulk NutrientsThermowhey Weight Loss Protein | A$76A$2.28 per 30 g protein | A$62.001 kg | 82%label | View Bulk Nutrients Thermowhey Weight Loss Protein at Bulk Nutrients |
| 9 | Bulk NutrientsWhey Protein Concentrate | A$82A$2.46 per 30 g protein | A$59.001 kg | 72%label | View Bulk Nutrients Whey Protein Concentrate at Bulk Nutrients |
| 10 | Bulk NutrientsNatural Australian Whey Protein Concentrate | A$85A$2.55 per 30 g protein | A$61.001 kg | 72%label | View Bulk Nutrients Natural Australian Whey Protein Concentrate at Bulk Nutrients |
| 11 | MusashiPlant Protein Powder | A$94A$2.82 per 30 g protein | A$133.492 kg | 71%label | View Musashi Plant Protein Powder at Musashi |
| 12 | Bulk NutrientsWhey Protein Isolate | A$95A$2.86 per 30 g protein | A$79.001 kg | 83%label | View Bulk Nutrients Whey Protein Isolate at Bulk Nutrients |
| 13 | Bulk NutrientsHASTA Whey Protein Isolate | A$96A$2.89 per 30 g protein | A$82.001 kg | 85%label | View Bulk Nutrients HASTA Whey Protein Isolate at Bulk Nutrients |
| 14 | Bulk NutrientsNatural Whey Protein Isolate | A$99A$2.96 per 30 g protein | A$80.001 kg | 81%label | View Bulk Nutrients Natural Whey Protein Isolate at Bulk Nutrients |
| 15 | BSc SupplementsHigh Protein | A$103A$3.10 per 30 g protein | A$55.00800 g | 67%label | View BSc Supplements High Protein at Nutrition Warehouse |
| 16 | Musashi100% Whey Protein Powder | A$107A$3.20 per 30 g protein | A$154.992 kg | 73%label | View Musashi 100% Whey Protein Powder at Musashi |
| 17 | MusashiHigh Protein Powder | A$109A$3.27 per 30 g protein | A$144.992 kg | 67%label | View Musashi High Protein Powder at Musashi |
| 18 | Genetix NutritionPure Whey | A$109A$3.28 per 30 g protein | A$69.95900 g | 71%label | View Genetix Nutrition Pure Whey at Nutrition Warehouse |
| 19 | bRawUltimate Peanut Protein | A$112A$3.36 per 30 g protein | A$69.951 kg | 63%label | View bRaw Ultimate Peanut Protein at Nutrition Warehouse |
| 20 | MusashiHigh Protein Powder | A$115A$3.45 per 30 g protein | A$68.99900 g | 67%label | View Musashi High Protein Powder at Nutrition Warehouse |
| 21 | International ProteinApex Beef Protein Isolate | A$116A$3.47 per 30 g protein | A$230.002.27 kg | 88%label | View International Protein Apex Beef Protein Isolate at Nutrition Warehouse |
| 22 | Happy WayMen's Premium Whey Protein | A$117A$3.50 per 30 g protein | A$86.951 kg | 75%label | View Happy Way Men's Premium Whey Protein at Nutrition Warehouse |
| 23 | BSc SupplementsWhey Protein Powder | A$117A$3.50 per 30 g protein | A$60.00720 g | 71%label | View BSc Supplements Whey Protein Powder at Nutrition Warehouse |
| 24 | Bare BlendsBare Whey Protein Isolate | A$146A$4.38 per 30 g protein | A$94.99750 g | 87%label | View Bare Blends Bare Whey Protein Isolate at Bare Blends |
| 25 | Pillar PerformanceGrass Fed WPI | A$169A$5.06 per 30 g protein | A$134.951 kg | 80%label | View Pillar Performance Grass Fed WPI at Nutrition Warehouse |
| 26 | MusashiWhey Protein Isolate - WPI | A$190A$5.69 per 30 g protein | A$133.49900 g | 78%label | View Musashi Whey Protein Isolate - WPI at Musashi |
Prices checked 7 Nov 2026 (daily), cheapest flavour and best-value size in stock, before shipping and discount codes. Protein % is from each label. How we calculate.
| # | Product | US$ per kg of protein | Price | Protein | Link |
|---|---|---|---|---|---|
| 1 | NOW FoodsSports, Pea Protein Powder, Unflavored, 7 lbs (3,175 g) | US$35US$1.05 per 30 g protein | US$80.913.17 kg | 73%label | View NOW Foods Sports, Pea Protein Powder, Unflavored, 7 lbs (3,175 g) at Vitacost |
| 2 | Nutrex ResearchWhole Food Protein, Vanilla Milkshake, 2 lb (910 g) | US$67US$2.00 per 30 g protein | US$41.63910 g | 69%label | View Nutrex Research Whole Food Protein, Vanilla Milkshake, 2 lb (910 g) at Vitacost |
| 3 | Global HealingOrganic Pure Plant Protein, Chocolate, 1.66 lb (753 g) | US$164US$4.92 per 30 g protein | US$64.95753 g | 53%label | View Global Healing Organic Pure Plant Protein, Chocolate, 1.66 lb (753 g) at Vitacost |
| 4 | SunwarriorClear Protein, Lemon Ice, 1.09 lb (496 g) | US$175US$5.25 per 30 g protein | US$49.97496 g | 58%label | View Sunwarrior Clear Protein, Lemon Ice, 1.09 lb (496 g) at Vitacost |
| 5 | SunwarriorClear Protein, Peach Tea, 1.07 lb (489 g) | US$177US$5.32 per 30 g protein | US$49.97489 g | 58%label | View Sunwarrior Clear Protein, Peach Tea, 1.07 lb (489 g) at Vitacost |
Prices checked 7 Nov 2026 (daily), cheapest flavour and best-value size in stock, before shipping and discount codes. Protein % is from each label. How we calculate.
| # | Product | £ per kg of protein | Price | Protein | Link |
|---|---|---|---|---|---|
| 1 | XL NutritionXTRA Whey 2kg | £29£0.86 per 30 g protein | £39.992 kg | 70%label | View XL Nutrition XTRA Whey 2kg at Discount Supplements |
| 2 | XL NutritionXTRA Whey 2kg | £29£0.86 per 30 g protein | £39.992 kg | 70%label | View XL Nutrition XTRA Whey 2kg at Discount Supplements |
| 3 | Applied NutritionEssential Protein Powder 1.6kg | £36£1.07 per 30 g protein | £39.951.6 kg | 70%label | View Applied Nutrition Essential Protein Powder 1.6kg at Discount Supplements |
| 4 | Applied NutritionEssential Protein Powder 1.6kg | £36£1.07 per 30 g protein | £39.951.6 kg | 70%label | View Applied Nutrition Essential Protein Powder 1.6kg at Discount Supplements |
| 5 | EFECTIV NutritionGrass Fed Whey Protein Isolate - 66 Servings - EFECTIV® | £36£1.08 per 30 g protein | £64.992 kg | 90%label | View EFECTIV Nutrition Grass Fed Whey Protein Isolate - 66 Servings - EFECTIV® at EFECTIV Nutrition |
| 6 | Per4m NutritionAdvanced Protein Blend 1.8kg | £38£1.14 per 30 g protein | £47.951.8 kg | 70%label | View Per4m Nutrition Advanced Protein Blend 1.8kg at Discount Supplements |
| 7 | Per4m NutritionAdvanced Protein Blend 1.8kg | £38£1.14 per 30 g protein | £47.951.8 kg | 70%label | View Per4m Nutrition Advanced Protein Blend 1.8kg at Discount Supplements |
| 8 | Applied Nutrition LtdDiet Whey Protein | £38£1.14 per 30 g protein | £54.951.8 kg | 80%label | View Applied Nutrition Ltd Diet Whey Protein at Applied Nutrition plc |
| 9 | Bio-Synergy®Lean & Green® | £53£1.58 per 30 g protein | £34.99908 g | 73%label | View Bio-Synergy® Lean & Green® at Bio-Synergy |
| 10 | EFECTIV NutritionEFECTIV® Clear Whey Protein Isolate | £62£1.87 per 30 g protein | £29.99600 g | 80%label | View EFECTIV Nutrition EFECTIV® Clear Whey Protein Isolate at EFECTIV Nutrition |
| 11 | Protein RebelAccelerate — Vegan Protein Powder, Vanilla | £65£1.96 per 30 g protein | £29.99600 g | 77%label | View Protein Rebel Accelerate — Vegan Protein Powder, Vanilla at Protein Rebel UK |
| 12 | Supplement NeedsVegan Iso+ - 1kg | £66£1.99 per 30 g protein | £39.991 kg | 60%label | View Supplement Needs Vegan Iso+ - 1kg at Supplement Needs |
Prices checked 7 Nov 2026 (daily), cheapest flavour and best-value size in stock, before shipping and discount codes. Protein % is from each label. How we calculate.
Guides
- Cheapest whey protein
Every whey (isolate, concentrate, blends) ranked by price per kg of protein.
- Cheapest whey protein isolate (WPI)
WPI and clear whey, cheapest real protein first.
- Whey isolate vs concentrate: is WPI worth the extra?
Label protein %, price per kg of protein, and who each suits.
- Best value protein powder
Value = price per gram of protein. The full ranking, updated daily.
- Protein cost per gram calculator
Work out price per kg of protein for any tub in 10 seconds.
- Cheapest vegan & plant protein powder
Pea, rice, soy and blends ranked by price per kg of protein.
- Cheapest casein protein
Micellar casein ranked by price per kg of protein.
- Cheapest unflavoured protein powder
Natural / unflavoured powders for cooking and smoothies.
- Lactose-free protein powder: cheapest options
Plant, beef and egg powders, plus what "low lactose" means for WPI.
- Protein powder for women: do you need a "women's" formula?
We compared "women's" products against standard powders on price per kg of protein.
- Protein powder for weight loss: what the "diet" label costs you
Diet / lean / shred powders vs standard whey, by the numbers.
- Whey protein price: what a fair price per kg is in 2026
Typical and cheapest prices per kg of protein in Australia, the US and the UK.
How this works
Every morning we read each store's public price list, take the cheapest flavour in the best-value size that is in stock, and divide by the protein per 100 g printed on that product's label. Shipping, coupon codes and subscribe-and-save discounts are not included. We list the cheapest product first even when that store pays us nothing. Full details: methodology.