Protein
30.3g
Output
128 oz
128 oz
0.8%
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Price as of Jul 24, 2026. Product prices and availability are accurate as of the date indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
Inputs
Result
1 gal = 3,785 ml. Sweet whey at 0.8% protein = 3,785 × 0.008 = 30.3g protein. Liquid method = 100% yield volume = 128 oz.
Inputs
Result
2 gal = 7,570 ml. Acid whey at 0.6% = 7,570 × 0.006 = 45.4g. Evaporation at 20% yield = 256 × 0.20 = 51 oz concentrate.
Sweet whey from rennet cheese contains about 0.8% protein, which equals approximately 30 grams of protein per gallon (3,785 ml). Acid whey from yogurt or ricotta contains less at about 0.6%, yielding roughly 23 grams of protein per gallon.
| Whey Type | Protein % | Protein/Gallon | Source |
|---|---|---|---|
| Sweet Whey | 0.8% | 30g | Rennet cheeses |
| Acid Whey | 0.6% | 23g | Yogurt, ricotta |
Yes, but yield is very low for home processing. One gallon of sweet whey yields only about 8.3 ounces of dried powder (6.5% yield) containing roughly 30 grams of protein. Commercial whey protein isolate requires ultrafiltration equipment not available for home use.
Liquid whey has many uses beyond protein extraction: substitute it for water in bread recipes, use it as a cooking liquid for pasta or grains, add it to smoothies, feed it to plants or animals, or lacto-ferment vegetables with it.
Cheese making produces roughly 90% whey by volume. One gallon of milk yields about 115 oz of whey and only 12–16 oz of cheese depending on type. That means a typical 2-gallon batch produces nearly 2 gallons of liquid whey.
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Last Updated: Jul 24, 2026
This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.