Kilowatt-hours to Tonnes Of Oil Equivalent (kWh to toe)

1 kilowatt-hour equals 0.00008598452279 tonnes of oil equivalent (rounded).

1 kilowatt-hour = 0.00008598452279 tonnes of oil equivalent

How to convert kilowatt-hours to tonnes of oil equivalent

To convert kilowatt-hours to tonnes of oil equivalent, multiply the number of kilowatt-hours by 0.00008598452279. The factor is rounded to 10 significant digits. To go the other way, multiply tonnes of oil equivalent by 11,630.

tonnes of oil equivalent = kilowatt-hours × 0.00008598452279

Example: 10 kilowatt-hours = 0.0008598452279 tonnes of oil equivalent.

The 'calorie' on food labels is really a kilocalorie. The thermochemical calorie (4.184 J) is used here unless marked IT.

About these units

Kilowatt-hour (kWh)

Metric (SI)Current unit

3.6 million joules, the energy used by a 1,000-watt appliance in an hour. The billing unit for household electricity.

Before it was a line on every power bill, the kilowatt-hour had a British nickname: the Board of Trade unit, abbreviated B.T.U. after the government body that regulated the electricity industry until 1942, when the Ministry of Power took over. In India it is still often called simply a unit, and a million of them, written MU, is a gigawatt-hour.

A kilowatt-hour is the energy of a 1 kW device running for an hour, which is 3.6 MJ, or about 3,412 British thermal units. A 100 W television watched for 10 hours uses one, and boiling a liter of water in an electric kettle takes about 0.1. In 2020 the average US household used 893 kWh a month, an average continuous draw of about 1.22 kW.

Utilities multiply the kilowatt-hours consumed by a price per kWh, and larger customers may also pay for peak demand. One common error is writing kW/h, which would mean kilowatts per hour, a rate of change of power, not energy.

1 kilowatt-hour = 3,600,000 joules (exactly).

Sources: Wikipedia: Kilowatt-hour; Wikipedia: British thermal unit; Wikipedia: Watt-hour

Tonne Of Oil Equivalent (toe)

Metric (SI)Current unit

Exactly 41.868 GJ, the energy released by burning one tonne of crude oil. A standard unit in energy statistics.

Energy statisticians need a way to add up coal, gas, hydro and oil in one column, and the tonne of oil equivalent does that by expressing everything as the heat from burning a tonne of crude oil. Because crude oils differ in calorific value, the figure is a convention rather than a measurement, and more than one version circulates. The International Energy Agency uses 41.868 gigajoules, which is the figure used here. Other sources use 41.85 gigajoules, and a version based on the thermochemical calorie gives 44.769.

In everyday terms the IEA value is 11,630 kilowatt-hours, or about 39.7 million British thermal units, and it equals 10 gigacalories on the international steam table calorie. Smaller and larger steps are the kilogram of oil equivalent (one thousandth) and the megatoe and gigatoe. One toe is about 7.33 barrels of oil equivalent and 1.42857 tonnes of coal equivalent. Converting electricity into toe depends on an assumed plant efficiency, so national tables can differ.

1 tonne of oil equivalent = 41,868,000,000 joules (exactly).

Sources: Wikipedia: Tonne of oil equivalent; Wikipedia: Calorie

Related conversions

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