Buttermilk is around 40 calories per 100g, with 3.3g of protein, 4.8g of carbs, and 0.9g of fat. Lower-fat option in the dairy category.
Calories scale with portion. Here's how a typical buttermilk serving translates in your tracker:
Very low calorie — at 40 kcal per 100g, buttermilk adds volume to a meal without meaningfully denting a calorie deficit.
Point your iPhone camera at buttermilk and Spotwell's on-device AI estimates the portion and macros in under a second — no manual entry, no barcode hunting.
Download on theApp StoreButtermilk has approximately 40 calories per 100g. A typical serving — 3 oz (85g) — comes in at 34 calories.
3.3g of protein per 100g. That puts buttermilk at roughly 8.2g of protein per 100 calories — a useful lens when comparing to other dairy 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. Buttermilk is naturally low-calorie at 40 kcal per 100g, so it's easy to fit into a deficit.