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# ENERGY Units Conversion

## ENERGY UNIT MEASUREMENT

Energy is a property of objects which can be transferred to other objects or converted into different forms. The "ability of a system to perform work" is a common description, but it is misleading because energy is not necessarily available to do work. For instance, in SI units, energy is measured in joules, and one joule is defined "mechanically", being the energy transferred to an object by the mechanical work of moving it a distance of 1 meter against a force of 1 newton. However, there are many other definitions of energy, depending on the context, such as thermal energy, radiant energy, electromagnetic, nuclear, etc., where definitions are derived that are the most convenient.

In the International System of Units (SI), the unit of energy is the joule, named after James Prescott Joule. It is a derived unit. It is equal to the energy expended (or work done) in applying a force of one newton through a distance of one meter. However energy is also expressed in many other units not part of the SI, such as ergs, calories, British Thermal Units, kilowatt-hours and kilocalories, which require a conversion factor when expressed in SI units.

The SI unit of energy rate (energy per unit time) is the watt, which is a joule per second. Thus, one joule is one watt-second, and 3600 joules equal one watt-hour. The CGS energy unit is the erg and the imperial and US customary unit is the foot pound. Other energy units such as the electronvolt, food calorie or thermodynamic kcal, and BTU are used in specific areas of science and commerce.

## Units of energy

• Atomic Bomb [nuclear Weapon] (at bomb)
• Atomic Unit Of Energy (au)
• Attojoules (aJ)
• Attowatt Hour (aWh)
• Barrel Of Oil Equivalent (BOE)
• British Thermal Unit (BTU)
• British Thermal Unit 39°F 3.9°C (BTU39°F)
• British Thermal Unit 59°F 15°C (BTU59°F)
• British Thermal Unit 60°F 15.6°C (BTU60°F)
• British Thermal Unit 63°F 17.2°C (BTU63°F)
• British Thermal Unit ISO (BTUiso)
• British Thermal Unit IT (BTUit)
• British Thermal Unit Mean (BTUmean)
• British Thermal Unit Thermochemical (BTUth)
• Calories (cal)
• Calories 15°C (cal15°C)
• Calories 20°C (cal20°C)
• Calories 3.98°C (cal3.98°C)
• Calories IT (calIT)
• Calories Mean (calMean)
• Calories Thermochemical (calTh)
• Celsius Heat Unit (CHU)
• Centijoules (cJ)
• Centiwatt Hour (cWh)
• Cubic Centimeter Of Atmosphere (cc atm)
• Cubic Foot Of Atmosphere (cu ft atm)
• Cubic Foot Of Natural Gas (cu ft ng)
• Cubic Yard Of Atmosphere (cu yd atm)
• Decajoules (daJ)
• Decawatt Hour (daWh)
• Decijoules (dJ)
• Deciwatt Hour (dWh)
• Electron Volt (eV)
• Ergs (ergs)
• Exaelectron Volt (EeV)
• Exajoules (EJ)
• Exawatt Hour (EWh)
• Femtojoules (fJ)
• Femtowatt Hour (fWh)
• Foe (foe)
• Foot Pound (ftlb)
• Foot Pound Force (ft lbf)
• Foot Poundal (ft pdl)
• Gallon Atmosphere UK (UK gal atm)
• Gallon Atmosphere US (US gal atm)
• Gasoline Gallon Equivalent (gge)
• Gigaelectron Volt (GeV)
• Gigagrams Of TNT (GgTNT)
• Gigajoules (GJ)
• Gigatons Of TNT (GtTNT)
• Gigawatt Hour (GWh)
• Grams Of TNT (gTNT)
• Hartree (Eh, Ha)
• Hectojoules (hJ)
• Hectowatt Hour (hWh)
• Hiroshima Bomb Explosion (hbe)
• Horsepower Hour (hph)
• Inch Pound Force (in lbf)
• Joules (J)
• Kilocalories (kcal)
• Kiloelectron Volt (keV)
• Kilograms Of TNT (kgTNT)
• Kilojoules (kJ)
• Kilotons Of TNT (ktTNT)
• Kilowatt Hour (kWh)
• Large Calories (Cal)
• Liter Atmosphere (l atm)
• Megaelectron Volt (MeV)
• Megagrams Of TNT (MgTNT)
• Megajoules (MJ)
• Megatons Of TNT (MtTNT)
• Megawatt Hour (MWh)
• Microjoules (µJ)
• Microtons Of TNT (μtTNT)
• Microwatt Hour (μWh)
• Millielectron Volt (meV)
• Millijoules (mJ)
• Millitons Of TNT (mtTNT)
• Milliwatt Hour (mWh)
• Nanojoules (nJ)
• Nanowatt Hour (nWh)
• Newton Meter (Nm)
• Petaelectron Volt (PeV)
• Petagrams Of TNT (PgTNT)
• Petajoules (PJ)
• Petawatt Hour (PWh)
• Picojoules (pJ)
• Picowatt Hour (pWh)
• Rydberg (Ry)
• Standard Cubic Centimeter (scc)
• Standard Cubic Foot (scf)
• Standard Cubic Yard (scy)
• Teraelectron Volt (TeV)
• Teragrams Of TNT (TgTNT)
• Terajoules (TJ)
• Teratons Of TNT (TtTNT)
• Terawatt Hour (TWh)
• Therm US (thm)
• Thermie (th)
• Ton Of Coal Equivalent (TCE)
• Tonne Of Oil Equivalent (toe)
• Tons Of TNT (tTNT)
• Watt Hour (Wh)
• Yoctojoules (yJ)
• Yoctowatt Hour (yWh)
• Yottajoules (YJ)
• Yottawatt Hour (YWh)
• Zeptojoules (zJ)
• Zeptowatt Hour (zWh)
• Zettajoules (ZJ)
• Zettawatt Hour (ZWh)