How many calories in
spirulina?
Per 100g, spirulina brings 290 calories with 24g of carbs (most of which is fiber). Worth portioning if you treat it like a free veg; it has more density than spinach or cucumber.
Common serving sizes.
Calories scale with portion. Here's how a typical spirulina serving translates in your tracker:
What 290 calories means.
Protein-dense — 19.7 g of protein per 100 kcal makes spirulina an efficient choice for hitting a protein target while managing calories.
Spirulina vs. similar foods.
How spirulina stacks up on calories and protein against foods people commonly compare it to:
Skip the lookup. Snap the plate.
Point your iPhone camera at spirulina and Spotwell's AI estimates the portion and macros in a few seconds. Check it, adjust anything that looks off, and log it.
Download on theApp StoreQuick answers.
How many calories in spirulina?
Spirulina has approximately 290 calories per 100g. A typical serving — 3 oz (85g) — comes in at 247 calories.
How much protein is in spirulina?
57g of protein per 100g. That puts spirulina at roughly 19.7g of protein per 100 calories — a useful lens when comparing to other vegetables sources.
How do I log spirulina accurately?
The simplest method: weigh it on a kitchen scale, then enter grams in your tracker. With Spotwell, you can skip the scale — point the camera at the plate and the AI estimates the portion in a few seconds. Adjust the value if it looks off.
Is spirulina good for weight loss?
It depends on your overall calorie target. Spirulina sits in a moderate calorie range. It can fit any goal — weight loss, maintenance, or muscle gain — when portioned to your daily target.