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Watt-hours to Kilocalories conversion

Watt-hours to Kilocalories conversion table

Watt-hours (Wh)Kilocalories (kcal)
00
10.8604206500956
21.7208413001912
32.5812619502868
43.4416826003824
54.302103250478
65.1625239005736
76.0229445506692
86.8833652007648
97.7437858508604
108.604206500956
2017.208413001912
3025.812619502868
4034.416826003824
5043.02103250478
6051.625239005736
7060.229445506692
8068.833652007648
9077.437858508604
10086.04206500956
1000860.4206500956

How to convert watt-hours to kilocalories?

Sure, I'd be happy to help with that.

To convert watt-hours (Wh) to kilocalories (kcal), you need to know the relationship between these two units of energy:

1 watt-hour (Wh) = 3600 joules (J) (since 1 watt is equal to 1 joule per second, and there are 3600 seconds in an hour).

1 kilocalorie (kcal) = 4184 joules (by definition).

So, to convert watt-hours to kilocalories:

1 Wh=3600 J1 \text{ Wh} = 3600 \text{ J}

1 kcal=4184 J\text{1 kcal} = 4184 \text{ J}

Therefore,

1 Wh=3600 J4184 J/kcal≈0.860 kcal1 \text{ Wh} = \frac{3600 \text{ J}}{4184 \text{ J/kcal}} \approx 0.860 \text{ kcal}

So, 1 watt-hour is approximately 0.860 kilocalories.

Now, let’s look at some real-world examples for other quantities of watt-hours:

  1. Smartphone Battery (around 15 watt-hours): 15 Wh×0.860 kcal/Wh=12.9 kcal15 \text{ Wh} \times 0.860 \text{ kcal/Wh} = 12.9 \text{ kcal} This amount of energy can be used to power a standard smartphone for a day or so.

  2. Laptop Battery (around 50 watt-hours): 50 Wh×0.860 kcal/Wh=43 kcal50 \text{ Wh} \times 0.860 \text{ kcal/Wh} = 43 \text{ kcal} This amount of energy is sufficient to run a laptop for around 3-5 hours.

  3. Tesla Model S Battery (100 kWh, which is 100,000 Wh): 100,000 Wh×0.860 kcal/Wh=86,000 kcal100,000 \text{ Wh} \times 0.860 \text{ kcal/Wh} = 86,000 \text{ kcal} This is the amount of energy stored in a fully-charged Tesla Model S battery, which can drive around 370 miles on a single charge.

  4. Daily Household Electricity Usage (30 kWh): 30,000 Wh×0.860 kcal/Wh=25,800 kcal30,000 \text{ Wh} \times 0.860 \text{ kcal/Wh} = 25,800 \text{ kcal} This is an average daily electricity consumption for a household in the United States.

  5. Human Daily Caloric Intake (~2500 kcal): For a comparison, the daily caloric intake of an average person is around 2500 kcal, so: 2500 kcal≈2907 Wh2500 \text{ kcal} \approx 2907 \text{ Wh} This means the energy consumed by a person in a day is roughly equivalent to 2.9 kWh.

These examples give you a sense of how different quantities of watt-hours relate to everyday energy use and can be converted into kilocalories.

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 Kilocalories to other unit conversions.

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

What is kilocalories?

Kilocalories (kcal) are a unit of energy that measures the amount of heat or energy required to raise the temperature of 1 kilogram of water by 1 degree Celsius. In other words, it's a measure of how much energy is needed to change the state of a substance (in this case, water).

In nutrition and food science, kilocalories are used to express the energy content of foods and drinks. One kilocalorie is equal to 1000 calories (not to be confused with "Calories" which is capitalized and refers to the unit of energy specifically related to the human body). The term "kilocalorie" is often shortened to simply "calorie", but technically, it's a measure of the energy content of foods and drinks.

Here are some examples of how kilocalories are used in everyday life:

  1. Food labels: When checking nutrition labels on packaged foods, you'll see the energy content listed in kilocalories (kcal).
  2. Caloric intake: The number of kilocalories an individual consumes or burns is a measure of their caloric balance.
  3. Physical activity: The energy expended during exercise or physical activity is also measured in kilocalories.

To give you an idea of the scale, here are some approximate kilocalorie values for common foods and drinks:

  • Apple (1 medium): 95 kcal
  • Banana (1 medium): 105 kcal
  • Cup of coffee: 0-2 kcal
  • Glass of water: 0 kcal

I hope that helps you understand what kilocalories are!

Complete Watt-hours conversion table

Enter # of Watt-hours
Convert 1 Wh to other unitsResult
Watt-hours to Watt-seconds (Wh to Ws)3600
Watt-hours to Watt-minutes (Wh to Wm)60
Watt-hours to Milliwatt-hours (Wh to mWh)1000
Watt-hours to Kilowatt-hours (Wh to kWh)0.001
Watt-hours to Megawatt-hours (Wh to MWh)0.000001
Watt-hours to Gigawatt-hours (Wh to GWh)1e-9
Watt-hours to Joules (Wh to J)3600
Watt-hours to Kilojoules (Wh to kJ)3.6
Watt-hours to Megajoules (Wh to MJ)0.0036
Watt-hours to Gigajoules (Wh to GJ)0.0000036
Watt-hours to calories (Wh to cal)860.4206500956
Watt-hours to Kilocalories (Wh to kcal)0.8604206500956

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