Reese's Peanut Butter Cup is 515 calories per 100g. A single serving is typically 206–309 calories depending on the producer; the per-100g number is most useful as a comparison tool.
Calories scale with portion. Here's how a typical reese's peanut butter cup serving translates in your tracker:
Carb-forward — most of its 515 kcal come from carbohydrate, so it's best placed around training when your body uses carbs most readily.
How reese's peanut butter cup stacks up on calories and protein against foods people commonly compare it to:
Point your iPhone camera at reese's peanut butter cup and Spotwell's on-device AI estimates the portion and macros in under a second — no manual entry, no barcode hunting.
Download on theApp StoreReese's Peanut Butter Cup has approximately 515 calories per 100g. A typical serving — 3 oz (85g) — comes in at 438 calories.
12g of protein per 100g. That puts reese's peanut butter cup at roughly 2.3g of protein per 100 calories — a useful lens when comparing to other sweets 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. Reese's Peanut Butter Cup is calorie-dense at 515 kcal per 100g, so portion control matters more than with low-cal foods.