Kilowatt-hours to calories conversion

What is kilowatt-hours?

A Kilowatt-hour is a unit of energy and its units, kWh, are formed with W for watt and h for hour from SI unit system combined with letter k, metric prefix, for 1,000 or $10^3$. Its definition, in the context of electricity, is the energy of one watt power flowing for one hour.

Followings equivalent equations are identical but in different units. Please note that factor $10^3$ is representing Kilo prefix in kWh unit.

$$1 kWh = 10^3*Pt = 10^3*IVt = 3600 * 10^3*J = 2.247 * 10^{22} * 10^3 eV = 8.598*10^5 * 10^3 cal$$

$P - Power$
$t - Time \text{ (in hours. Multiply by 3600 to convert to seconds)}$
$I - Current$ $V - Volts$
$J - Joules$
$eV - Electronvolt$
$cal - Calories$

Wikipedia page for Kilowatt-hour (watt-hour redirected to kWh) UCI article on Energy Units and Conversions Ian Woofenden's explanation on difference between Watts and Watt-Hours

What is calories?

Calories are a unit of measurement that represents the amount of energy your body gets from consuming food and drinks. In other words, they measure the energy content of what you eat.

Here's how it works:

1. Your body uses calories to function: To grow, repair tissues, and maintain basic bodily functions (like beating your heart or breathing), your body needs a certain amount of energy.
2. Food provides that energy: When you eat food, the carbohydrates, proteins, and fats in those foods are broken down into different forms of energy. This process is called metabolism.
3. Calories represent that energy: The total amount of energy from these processes is measured in calories (or kilocalories). One calorie is equal to 4.184 joules.

Think of it like this:

• A car engine needs gasoline to run, and a certain amount of gasoline provides a specific amount of energy.
• Similarly, your body "runs" on the energy provided by the foods you eat. The more calories in those foods, the more energy they provide for your bodily functions.

Here are some common examples of calorie sources:

• 1 banana: approximately 100-110 calories
• 1 apple: around 95 calories
• 1 cup of cooked rice: about 200-250 calories

When you consume a certain amount of calories, your body uses that energy to perform various functions. Excess calories can lead to weight gain if not balanced with physical activity or burned off through exercise.

Does this help clarify what calories are?