Crab meat is around 87 calories per 100g, very lean, with 18g of protein. King and snow crab numbers track closely. Like lobster, the calorie story flips dramatically once melted butter or mayo enters the picture — straight crab cocktail is a low-cal protein hit.
Calories scale with portion. Here's how a typical crab serving translates in your tracker:
Point your iPhone camera at crab and SpotWell's on-device AI estimates the portion and macros in under a second — no manual entry, no barcode hunting.
Download on theApp StoreCrab has approximately 87 calories per 100g. A typical serving — 1 cup, lump (135g) — comes in at 117 calories.
18g of protein per 100g. That puts crab at roughly 20.7g of protein per 100 calories — a useful lens when comparing to other protein 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. Crab is naturally low-calorie at 87 kcal per 100g, so it's easy to fit into a deficit.