Energy
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Measurement
Energy measurement
Units of energy
Units of energy
Because energy is defined via work, the SI unit for energy is the same as the unit of work – the joule (J), named in honor of James Prescott Joule and his experiments on the mechanical equivalen...
Watt second
A watt second (also watt-second, symbol W s or W·s) is a derived unit of energy equivalent to the joule.(Taylor & Thompson 2008, pp. 39–40, 53) The watt-second is the energy equiva...
Horsepower-hour
A horsepower-hour (hph) is an outdated unit of energy, not used in the SI system of units. The unit represents an amount of work a horse is supposed capable of delivering during an hour (a horsepower ...
Billion cubic metres of natural gas
Billion cubic metres of natural gas (abbreviated: bcm) is a measure of natural gas production and trade. Depending of implied standards, this measure may represent different value of energy content. ...
Erg
An erg (short for ergon, a Greek word meaning "work/task") is a unit of energy and mechanical work equal to 10 joules. It originated in the centimetre–gram–second (CGS) system of units, symbol "erg". ...
Erg - Wikipedia
Watt-hour per kilogram
The watt-hour per kilogram (SI abbreviation: W⋅h/kg) is a unit of specific energy commonly used to measure the density of energy in batteries and capacitors. One watt-hour per kilogram is equal to 36...
Foot-pound (energy)
The foot-pound force (symbol: ft·lbf or ft·lbf), or simply foot-pound (symbol: ft·lb) is a unit of work or energy in the Engineering and Gravitational Systems in United States customary and imperial u...
Petaton
The tonne (/tʌn/) (British and SI; SI symbol: t) or metric ton (American) is a non-SI metric unit of mass equal to 1000 kilograms; it is thus equivalent to one megagram (Mg). 1,000 kilograms is equiva...
Gasoline gallon equivalent
Gasoline gallon equivalent (GGE) or gasoline-equivalent gallon (GEG) is the amount of alternative fuel it takes to equal the energy content of one liquid gallon of gasoline. GGE allows consumers to co...
Barrel of oil equivalent
The barrel of oil equivalent (BOE) is a unit of energy based on the approximate energy released by burning one barrel (42 U.S. gallons or 158.9873 litres) of crude oil. The BOE is used by oil and gas...
Electricity meter
An electricity meter, electric meter, or energy meter is a device that measures the amount of electric energy consumed by a residence, business, or an electrically powered device.Electric utilities us...
Electricity meter - Wikipedia
Smart meter
A smart meter is usually an electronic device that records consumption of electric energy in intervals of an hour or less and communicates that information at least daily back to the utility for monit...
Smart meter - Wikipedia
Rydberg constant
The Rydberg constant, symbol R∞ or RH, named after the Swedish physicist Johannes Rydberg, is a physical constant relating to atomic spectra, in the science of spectroscopy. The constant first arose a...
Kilokaiser
The Kaiser (K) is a unit of energy. A common form is kiloKaiser (kK). 1 kK = 1000 cm. ( cm, wavenumber or inverse wavelength.) This unit is most commonly used with respect to energy transitio...
Foot-poundal
The Foot-poundal (symbol: ft-pdl) is a unit of energy that is part of the foot-pound-second system of units, in Imperial units introduced in 1879, and is from the specialized subsystem of English Abs...
Quad (unit)
A quad is a unit of energy equal to 10 (a short-scale quadrillion) BTU, or 1.055 × 10 joules (1.055 exajoules or EJ) in SI units.The unit is used by the U.S. Department of Energy in discussing wo...
Quad (unit) - Wikipedia
Kilogram oil equivalent
Kilogram(s) of oil equivalent (kgoe) is a normalised unit of energy. By convention it is equivalent to the approximate amount of energy that can be extracted from one kilogram of crude oil. It is a st...
Milliwatt hour
The kilowatt hour (symbol kWh, kW·h, or kW h) is a unit of energy equal to 1,000 watt-hours, or 3.6 megajoules. If the energy is being transmitted or used at a constant rate (power) over a p...
Hartree
The hartree (symbol: Eh or Ha), also known as the Hartree energy, is the atomic unit of energy, named after the British physicist Douglas Hartree. It is defined as 2R∞hc, where R∞ is the Rydberg const...
Exaton
The tonne (/tʌn/) (British and SI; SI symbol: t) or metric ton (American) is a non-SI metric unit of mass equal to 1000 kilograms; it is thus equivalent to one megagram (Mg). 1,000 kilograms is equiva...
Cubic mile of oil
The cubic mile of oil (CMO) is a unit of energy. It was created by Hew Crane of SRI International to aid in public understanding of global-scale energy consumption and resources.Significant sources o...
Cubic mile of oil - Wikipedia
Joule
The joule (/ˈdʒuːl/ or sometimes /ˈdʒaʊl/), symbol J, is a derived unit of energy, work, or amount of heat in the International System of Units. It is equal to the energy transferred (or work done) wh...
Teraton
The tonne (/tʌn/) (British and SI; SI symbol: t) or metric ton (American) is a non-SI metric unit of mass equal to 1000 kilograms; it is thus equivalent to one megagram (Mg). 1,000 kilograms is equiva...
Orders of magnitude (energy)
This list compares various energies in joules (J), organized by order of magnitude.
This SI unit is named after James Prescott Joule. As with every International System of Units (SI) unit whose na...
Nuclear weapon yield
The explosive yield of a nuclear weapon is the amount of energy discharged when a nuclear weapon is detonated, expressed usually in TNT equivalent (the standardized equivalent mass of trinitrotoluene ...
Nuclear weapon yield - Wikipedia
Calorie
The name calorie is used for two units of energy.Although these units are part of the metric system, they have been superseded in the International System of Units by the joule. One small calorie is ...
Maximum demand indicator
Maximum Demand Indicator(MDI) is an instrument which measures the maximum amount of electrical energy required by a specific consumer during a given period of time.
MDI instruments are designed in...
British thermal unit
The British thermal unit (BTU or Btu) is a traditional unit of energy equal to about 1055 joules. It is the amount of energy needed to cool or heat one pound of water by one degree Fahrenheit (Physica...
Planck energy
In physics, Planck energy, denoted by EP, is the unit of energy in the system of natural units known as Planck units.where c is the speed of light in a vacuum, ћ is the reduced Planck's constant, and ...
Therm
The therm (symbol thm) is a non-SI unit of heat energy equal to 100,000 British thermal units (BTU). It is approximately the energy equivalent of burning 100 cubic feet (often referred to as 1 CCF) of...