Calorie - Wikipedia
The calorie is a unit of energy that originated from the caloric theory of heat. [1] [2] The large calorie, food calorie, dietary calorie, or kilogram calorie is defined as the amount of heat needed to raise the temperature of one liter of water by one degree Celsius (or one kelvin).
Kcal vs. Calories: Differences and How to Convert - Healthline
Oct 29, 2024 · When it comes to nutrition and exercise, kilocalories (kcal) and calories equal the same amount of energy. You may also express energy as kilojoules (kJ), with one calorie or kcal equaling 4.18...
3.5: Energy and Calories - Medicine LibreTexts
Aug 10, 2020 · The unit of measurement that defines the energy contained in a energy-yielding nutrient is called a calorie. A calorie is the amount of energy in the form of heat that is required to heat one gram of water one degree Celsius.
What Are Calories? - Live Science
Oct 28, 2022 · Calories are units of energy that a food or drink provides. You can usually find calorie counts listed on food items, and wearables like the best fitness trackers allow you...
Calories (cal) - Energy Conversions - CheckYourMath
A calorie (or thermochemical calorie) is a unit of energy in the International System of Units (SI). The symbol for calorie is cal. A calorie is measured as the quantity of heat required to raise the temperature of 1 gram of water by 1°C from a standard initial temperature at a …
Calorie Calculator
This calorie calculator estimates the number of calories needed each day to maintain, lose, or gain weight. Learn the kinds of calories and their effects.
Understanding calories - NHS
Calories found in food and drink give you energy to do every day things. Find out why they are important and get tips for being aware of calories.
Calories - Calories - MSD Manual Consumer Version
Energy requirements vary markedly from about 1,000 to more than 3,200 calories a day depending on age, sex, weight, physical activity, disorders present, and the rate at which people burn calories (metabolic rate).
Calorie | Definition & Measurement | Britannica
Oct 4, 2024 · Calorie, a unit of energy or heat variously defined. The calorie was originally defined as the amount of heat required at a pressure of 1 standard atmosphere to raise the temperature of 1 gram of water 1° Celsius.
Kcal vs. Calories: Differences and How to Convert - MedicineNet
Kcal and calories are a unit of measurement of energy in nutrition and exercise. The terms are used interchangeably in nutrition and do not need to be converted. Calories are referred to as either small (lowercase “c”) or large (uppercase “C”), with …