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.
Calories scale with portion. Here's how a typical spirulina serving translates in your tracker:
Protein-dense — 19.7 g of protein per 100 kcal makes spirulina an efficient choice for hitting a protein target while managing calories.
How spirulina stacks up on calories and protein against foods people commonly compare it to:
Point your iPhone camera at spirulina and Spotwell's on-device AI estimates the portion and macros in under a second — no manual entry, no barcode hunting.
Download on theApp StoreSpirulina has approximately 290 calories per 100g. A typical serving — 3 oz (85g) — comes in at 247 calories.
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.
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 under a second. Adjust the value if it looks off.
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.