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Protein Powder
Price per ounce of protein powder.
The cheapest protein powder right now is PBfit Classic Peanut Butter Powder 30 Oz, Peanut Spread with 8g Protein at $0.456 / oz — 12 product lines compared, ranked by real price per oz.
💲 Prices and availability verified Aug 11, 2026, not live-updated yet — accurate as of that date and subject to change. Check the retailer for the current price before buying.
Price
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12 of 12 product lines · sorted by best price per unit
Best value
PBfit
PBfit Classic Peanut Butter Powder 30 Oz, Peanut Spread with 8g Protein
$0.456 / oz
$13.67 total · 1 size
Optimum Nutrition
Optimum Nutrition Serious Mass Weight Gainer Protein Powder, Vanilla, 6LB
$0.645 / oz
$61.94 total · 1 size
Revolution Nutrition
Revolution Nutrition, High Whey, Protein Powder 6LB, Whey Isolate, Gluten Free, Lean Muscle Mass for Men & Women, 25g of Protein Per Scoop, 2.7kg, 73 Servings (Vanilla Cake, 6 Pound)
$0.677 / oz
$64.99 total · 1 size
Muscle Milk
Muscle Milk Genuine Protein Powder, Vanilla Crème, 1.93 Pounds, 12 Servings, 32g Protein, 2g Sugar, Calcium, Vitamins A, C & D, NSF Certified for Sport, Energizing Snack, Packaging May Vary
$0.751 / oz
$23.18 total · 2 sizes
Quest
Quest Chocolate Milkshake Protein Powder, 22g Protein, 3 Pound
$0.812 / oz
$38.99 total · 1 size
Vega
Vega Essential Protein – 25g Vegan Protein Powder, Creamy Vanilla, Dairy-Free Vanilla Shake – Large Tub, 32.5oz (20 Servings)
$0.831 / oz
$26.99 total · 1 size
Six Star
Six Star Whey Protein Powder Plus - Triple Chocolate, 1.81 LBS
$0.862 / oz
$24.97 total · 1 size
Muscle Milk
Muscle Milk Pro Series Protein Powder Supplement, Knockout Chocolate, 2 Pound, 11 Servings, 50g Protein, 3g Sugar, 20 Vitamins & Minerals, NSF Certified for Sport, Workout Recovery, Packaging May Vary
$0.874 / oz
$27.97 total · 1 size
Body Fortress
Body Fortress Super Advanced Whey Protein Powder, Chocolate, 3.9 lbs
$0.958 / oz
$59.79 total · 2 sizes
Optimum Nutrition
Optimum Nutrition Gold Standard 100% Whey Protein Powder, Extreme Milk Chocolate, 5 Pound (Packaging May Vary)
$1.000 / oz
$79.99 total · 1 size
Animal
Animal 100% Whey Protein Powder – Whey Blend for Pre Workout or Post Workout, Recovery, Anytime Low Sugar Protein Boost Meal Replacement with BCAA Branched Chain Amino Acids – Cookies & Cream, 4 lb
$1.01 / oz
$64.95 total · 1 size
MuscleTech
MuscleTech Grass-Fed Whey Protein Powder - Triple Chocolate, 1.8LB
$1.04 / oz
$29.99 total · 1 size
Price filters apply to total listing price. Ranked by price per oz within your filters.