How much protein is in 100g of spirulina?
57g of protein, with 290 calories.
How Much Protein Is in Spirulina?
Spirulina has 57g of protein per 100g and 290 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 spirulina
Spirulina contains 57g of protein per 100g, alongside 290 calories. That works out to 19.7g of protein per 100 calories, which is a very high protein density.
A typical portion — 1 tbsp, about 7g — gives roughly 4g of protein and 20 calories.
To reach 30g of protein from spirulina alone you would need about 53g.
Spirulina compared with similar foods
Same category, ranked by protein per 100g.
| Food | Protein | Calories |
|---|---|---|
| 🌿 Chlorella (dried) | 58g | 320 |
| 🌿 Spirulina (dried) | 57g | 290 |
| 🌊 Nori (dried seaweed) | 41g | 35 |
| 🌊 Dulse (dried) | 22g | 33 |
| 🌊 Wakame (dried) | 13g | 45 |
| 🌊 Kombu (dried kelp) | 8g | 43 |
| 🌊 Irish moss (dried) | 6g | 49 |
| 🌿 Wild garlic (ramsons) | 6g | 149 |
Per 100g.
Using spirulina to hit a protein target
- Protein per 100g: 57g. Calories per 100g: 290. Quality: complete protein.
- Up to 70% protein by weight — but tiny servings.
- A spirulina 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 spirulina do I need for 30g of protein?
About 53g of spirulina provides 30g of protein.
Is spirulina a good protein source?
Yes. At 57g per 100g it is a strong protein source, and it is a complete protein.
Keep reading
Protein in chlorella58g per 100g, 320 calories.Protein in nori41g per 100g, 35 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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