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calories to Watt-hours conversion

calories to Watt-hours conversion table

calories (cal)Watt-hours (Wh)
00
10.001162222222222
20.002324444444444
30.003486666666667
40.004648888888889
50.005811111111111
60.006973333333333
70.008135555555556
80.009297777777778
90.01046
100.01162222222222
200.02324444444444
300.03486666666667
400.04648888888889
500.05811111111111
600.06973333333333
700.08135555555556
800.09297777777778
900.1046
1000.1162222222222
10001.1622222222222

How to convert calories to watt-hours?

Absolutely, let's break that down.

Conversion from Calories to Watt-Hours:

One calorie (specifically one gram calorie) is defined as the amount of energy needed to raise the temperature of one gram of water by one degree Celsius at one atmosphere of pressure. It is equivalent to approximately 4.184 joules.

1 Watt-hour (Wh) is a unit of energy that corresponds to the amount of work done when a one-watt electrical device runs for one hour. One Watt-hour equals 3600 joules (since power in watts is defined as joules per second and there are 3600 seconds in one hour).

To convert calories to Watt-hours:

1 calorie=4.184 joules\text{1 calorie} = 4.184 \text{ joules} 1 Watt-hour=3600 joules\text{1 Watt-hour} = 3600 \text{ joules}

Thus:

1 calorie=4.184 joules3600 joules/Watt-hour≈0.00116 Wh\text{1 calorie} = \frac{4.184 \text{ joules}}{3600 \text{ joules/Watt-hour}} \approx 0.00116 \text{ Wh}

So, one calorie is approximately 0.00116 Watt-hours.

Examples of Caloric Energy in Real-World Quantities:

  1. A Slice of Bread:

    • A slice of whole wheat bread contains around 70-80 dietary calories (kcal).
    • In energy terms: 80 kcal=80,000 cal80 \text{ kcal} = 80,000 \text{ cal}
    • In Watt-hours: 80,000 cal×0.00116 Wh/cal≈93 Wh80,000 \text{ cal} \times 0.00116 \text{ Wh/cal} \approx 93 \text{ Wh}

  2. Daily Caloric Intake:

    • The average daily caloric intake for an adult is about 2000 kcal.
    • In energy terms: 2000 kcal=2,000,000 cal2000 \text{ kcal} = 2,000,000 \text{ cal}
    • In Watt-hours: 2,000,000 cal×0.00116 Wh/cal≈2320 Wh2,000,000 \text{ cal} \times 0.00116 \text{ Wh/cal} \approx 2320 \text{ Wh}

  3. Running a 60W Light Bulb:

    • To run a 60-watt light bulb for one hour requires 60 Wh.
    • Converted to calories: 60 Wh×860.42calWh≈51,625 cal60 \text{ Wh} \times 860.42 \frac{\text{cal}}{\text{Wh}} \approx 51,625 \text{ cal}
    • This is roughly equivalent to the caloric content of a hearty meal!

Having these conversions at hand helps to compare and understand the various forms of energy consumption in daily activities and dietary context.

See below section for step by step unit conversion with formulas and explanations. Please refer to the table below for a list of all the Watt-hours to other unit conversions.

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?

What is watt-hours?

A watt-hour is a unit of energy and its units, Wh, are formed with W for watt and h for hour from SI unit system. 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.

1Wh=1Pt=1IVt=3600J=2.247∗1022eV=8.598∗105cal1 Wh = 1 Pt = 1 IVt = 3600 J = 2.247 * 10^{22} eV = 8.598*10^5 cal

P−PowerP - Power
t−Time (in hours. Multiply by 3600 to convert to seconds)t - Time \text{ (in hours. Multiply by 3600 to convert to seconds)}
I−CurrentI - Current V−VoltsV - Volts
J−JoulesJ - Joules
eV−ElectronvolteV - Electronvolt
cal−Caloriescal - 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

Complete calories conversion table

Enter # of calories
Convert 1 cal to other unitsResult
calories to Watt-seconds (cal to Ws)4.184
calories to Watt-minutes (cal to Wm)0.06973333333333
calories to Watt-hours (cal to Wh)0.001162222222222
calories to Milliwatt-hours (cal to mWh)1.1622222222222
calories to Kilowatt-hours (cal to kWh)0.000001162222222222
calories to Megawatt-hours (cal to MWh)1.1622222222222e-9
calories to Gigawatt-hours (cal to GWh)1.1622222222222e-12
calories to Joules (cal to J)4.184
calories to Kilojoules (cal to kJ)0.004184
calories to Megajoules (cal to MJ)0.000004184
calories to Gigajoules (cal to GJ)4.184e-9
calories to Kilocalories (cal to kcal)0.001

Energy conversions