Olive oil vs Butter: calories & macros

What the numbers say

Per 100 g Olive oil carries 884 kcal against 717 in Butter — 167 kcal more, 23% on top. The gap sits in the fat: 100 g in Olive oil against 81 g. The same 884 kcal is 100 g of Olive oil or 123 g of Butter. Butter fits a tight calorie budget more easily; Olive oil is the pick when a small volume has to carry the energy.