Protein Shake comes in around 65 calories per 100g. A 12-oz serving is 231 calories; a 16-oz pour is 307. Sweetened drinks are the #1 hidden calorie source for most people.
Calories scale with portion. Here's how a typical protein shake serving translates in your tracker:
Protein-dense — 13.8 g of protein per 100 kcal makes protein shake an efficient choice for hitting a protein target while managing calories.
How protein shake stacks up on calories and protein against foods people commonly compare it to:
Point your iPhone camera at protein shake and Spotwell's on-device AI estimates the portion and macros in under a second — no manual entry, no barcode hunting.
Download on theApp StoreProtein Shake has approximately 65 calories per 100g. A typical serving — 3 oz (85g) — comes in at 55 calories.
9g of protein per 100g. That puts protein shake at roughly 13.8g of protein per 100 calories — a useful lens when comparing to other beverages 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. Protein Shake is naturally low-calorie at 65 kcal per 100g, so it's easy to fit into a deficit.