noun
kilocalorie
A unit of energy equal to 1,000 calories, commonly used in nutrition and food labeling. In everyday Japanese, it is often simply called カロリー, but キロカロリー is used when precision is needed.
このおにぎりは約200キロカロリーです。
This rice ball is about 200 kilocalories.
1日の摂取キロカロリーを計算する。
Calculate daily kilocalorie intake.
カロリー is the more common everyday term for calorie, but technically refers to a small calorie. In practice, カロリー is often used where キロカロリー is meant, especially in casual contexts.
Loanword from English 'kilocalorie', itself from French 'kilocalorie'. The prefix 'kilo-' and 'calorie' are combined.