A plain small jacket potato (with skin, no toppings) is roughly 110–150 calories , depending on the exact size and variety.

Calorie range explained

  • A “small” jacket potato of about 130 g is often estimated at around 110 kcal.
  • Nutrition databases that list jacket potatoes per 100 g give around 80–90 kcal per 100 g , which lines up with that 110 kcal estimate for a small one.
  • If your “small” potato is a bit bigger (closer to 150–180 g), it can creep up to around 130–160 kcal even before any toppings.

What changes the calories?

  • Toppings matter more than the potato : butter, cheese, sour cream, beans, or coleslaw can easily add a few hundred extra calories on top of the base 110–150 kcal potato.
  • Oil or fat used in cooking (e.g., rubbed in oil before baking) will also raise the total, whereas a potato baked dry in the oven or microwave stays close to the base figure.

Quick rule of thumb

  • Plain small jacket potato: about 120 calories on average (safe ballpark for tracking).
  • Add toppings on top of that estimate rather than trying to include everything in one number, as this keeps food tracking more accurate.