How much protein is in 100g of whey protein isolate?
90g of protein, with 400 calories.
How Much Protein Is in Whey protein isolate?
Whey protein isolate has 90g of protein per 100g and 400 calories. Here is what that means per realistic portion, how it compares with similar foods, and how to use it to hit a daily protein target.
Protein in whey protein isolate
Whey protein isolate contains 90g of protein per 100g, alongside 400 calories. That works out to 22.5g of protein per 100 calories, which is a very high protein density.
A typical portion — 1 scoop, about 30g — gives roughly 27g of protein and 120 calories.
To reach 30g of protein from whey protein isolate alone you would need about 33g.
Whey protein isolate compared with similar foods
Same category, ranked by protein per 100g.
| Food | Protein | Calories |
|---|---|---|
| 🥤 Whey protein isolate | 90g | 400 |
| 🌱 Soy protein isolate | 90g | 390 |
| 🥤 Collagen peptides | 90g | 375 |
| 🥩 Beef protein isolate | 90g | 390 |
| 🥛 Casein protein | 80g | 360 |
| 🌱 Pea protein isolate | 80g | 380 |
| 🥤 Whey protein concentrate | 80g | 390 |
| 🌾 Brown rice protein | 80g | 390 |
Per 100g.
Using whey protein isolate to hit a protein target
- Protein per 100g: 90g. Calories per 100g: 400. Quality: complete protein.
- Fast-absorbing, top DIAAS score. ~27g per scoop.
- A whey protein isolate portion can anchor a meal on its own — build the rest of the plate around it.
- Log it in the Protein Calendar and the daily total updates automatically.
Turn this into dinner
Hunter Chef builds a recipe around the protein target you pick, with macros calculated from the real ingredients.
Open Hunter ChefCommon questions
How much whey protein isolate do I need for 30g of protein?
About 33g of whey protein isolate provides 30g of protein.
Is whey protein isolate a good protein source?
Yes. At 90g per 100g it is a strong protein source, and it is a complete protein.
Keep reading
Protein in soy protein isolate90g per 100g, 390 calories.Protein in collagen peptides90g per 100g, 375 calories.Protein CalculatorAdd this food to a full meal and get the total.What is Protein Hunter?
Protein Hunter is a protein and nutrition app with a database of 232 foods — from a leaf of kale to a wagyu steak — plus AI tools that answer protein questions, count a whole meal, build recipes to a macro target, and track what you actually eat.
- Search any food
- Count a full meal
- Recipes to your macros
- Scan a plate or label
Why it's different: the numbers are calculated from a fixed ingredient database rather than guessed, and when a target is not physically achievable the app says so instead of inventing a figure.
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