A terawatt-hour (TWh) is a unit of energy that represents one trillion watts of power used for one hour, and it equals 3.6 ×— 1015  Joules. This is equivalent to an impressive 3.6 million joules or 3.6 megajoules. This value is sufficiently large to represent the annual electricity generation of entire countries and is commonly used to describe significant energy production or consumption.

The value is equivalent to 1,000,000 megawatt-hours (MWh) or 1,000,000,000 kilowatt-hours (kWh) as well. One kilowatt-hour represents a consistent power of one kilowatt operating for a duration of one hour. 

Applications of TWh

Terawatt-hours are a unit of measurement used to quantify the amount of electricity or heat generated. In practical applications, it is commonly employed to facilitate comprehension of large quantities of electrical energy.

For example, in 2022, electricity consumption in the United States is predicted to reach 4,010 terawatt-hours. The residential sector is responsible for a significant portion of this consumption, closely followed by the commercial sector. Heating and cooling appliances make up a significant portion of residential electricity consumption.

Terawatt-Hour to Common Energy Units

Here are the conversions of one terawatt-hour (TWh) to various energy units.

1 TWh3.6E+15 joules (J)
1 TWh3600000000000 kilojoules (kJ)
1 TWh8.604206500956E+14 calories (cal)
1 TWh860420650095.6 kilocalories (kcal)
1 TWh2.2469385462308E+34 electron volt (eV)
1 TWh1000000000000 watt hour (Wh)
1 TWh8.2573655700885E+32 atomic unit of energy (au)
1 TWh860420.6500956 tons of TNT (tTNT)
1 TWh2.6552237373982E+15 foot pound force (ft Ibf)
1 TWh3.6E+22 ergs (ergs)

Recommended: How to Calculate kWh from Meter Reading

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Elliot is a passionate environmentalist and blogger who has dedicated his life to spreading awareness about conservation, green energy, and renewable energy. With a background in environmental science, he has a deep understanding of the issues facing our planet and is committed to educating others on how they can make a difference.

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