Lemon is 29 calories per 100g, mostly natural sugars. One of the lower-calorie fruits — a forgiving choice in tight macro budgets.
Calories scale with portion. Here's how a typical lemon serving translates in your tracker:
Very low calorie — at 29 kcal per 100g, lemon adds volume to a meal without meaningfully denting a calorie deficit.
How lemon stacks up on calories and protein against foods people commonly compare it to:
Point your iPhone camera at lemon and Spotwell's on-device AI estimates the portion and macros in under a second — no manual entry, no barcode hunting.
Download on theApp StoreLemon has approximately 29 calories per 100g. A typical serving — 3 oz (85g) — comes in at 25 calories.
1.1g of protein per 100g. That puts lemon at roughly 3.8g of protein per 100 calories — a useful lens when comparing to other fruits 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. Lemon is naturally low-calorie at 29 kcal per 100g, so it's easy to fit into a deficit.