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:
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.