A medium russet potato (about 5–6 oz / 140–170 g), baked with the skin, has roughly 150–170 calories.

Quick Scoop

  • 100 g raw russet potato: about 90–100 calories.
  • Small baked russet (around 5 oz / 140 g): about 130–140 calories.
  • Large baked russet with skin (around 10–11 oz / ~300 g): about 280–300 calories.

So if you’re picturing a typical single russet potato on your plate, it’s usually in the 130–300 calorie range depending mainly on size and whether it’s raw or baked with skin.

The big calorie jumps with potatoes usually come not from the potato itself, but from what you add: oil, butter, sour cream, cheese, or frying.

Tiny size guide (baked with skin)

  • Small (about 2" diameter): ~130–140 kcal.
  • Medium (about 5–6 oz): ~150–170 kcal (estimate based on 100 g values).
  • Large (3"–4¼" diameter, ~299 g): ~290 kcal.

TL;DR: If you don’t weigh it, assuming about 160 calories for a medium russet potato is a reasonable everyday estimate.

Information gathered from public forums or data available on the internet and portrayed here.