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Number of significat figures

Do you want rounded off figures or scientifically precise ones? For everyday conversions we recommend choosing 3 or 4 significant digits. If you want maximum precision, set the number to 9

Digit groups separator

Choose how you want to have your digit groups separated in long numbers:

1234567.89none
1 234 567.89space
1,234,567.89comma
1.234.567,89point

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  • Significant figures:
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International System (SI)

megajoule (MJ)
kilojoule (kJ)
joule (J)
Units: megajoule (MJ)  / kilojoule (kJ)  / joule (J)
» show »

Common Units

megacalorie (Mcal)
kilocalorie (kcal)
calorie (cal)
kilowatt hour (kW*h)
watt hour (W*h)
watt second (W*s)
horsepower hour (hp*h)
Celsius heat unit (CHU)
frigoria (fg)
metre-kilogram (mkg)
cubic centimeter of atmosphere, standard cubic centimeter (scc)
liter-atmosphere (l atm)
erg
electronvolt (eV)
Units: megacalorie (Mcal)  / kilocalorie (kcal)  / calorie (cal)  / kilowatt hour (kW*h)  / watt hour (W*h)  / watt second (W*s)  / horsepower hour (hp*h)  / Celsius heat unit (CHU)  / frigoria (fg)  / metre-kilogram (mkg)  / cubic centimeter of atmosphere, standard cubic centimeter (scc)  / liter-atmosphere (l atm)  / erg  / electronvolt (eV)
» show »

British and American

quad
therm
British Thermal Unit (BTU)
million BTU (MMBTU)
foot-pound (ft*lbs)
cubic foot of atmosphere, standard cubic foot (scf)
cubic yard of atmosphere, standard cubic yard (scy)
gallon-atmosphere (US)
gallon-atmosphere (UK)
Units: quad  / therm  / British Thermal Unit (BTU)  / million BTU (MMBTU)  / foot-pound (ft*lbs)  / cubic foot of atmosphere, standard cubic foot (scf)  / cubic yard of atmosphere, standard cubic yard (scy)  / gallon-atmosphere (US)  / gallon-atmosphere (UK)
» show »

TNT Energy Equivalent

tonne (metric) of TNT
ton of TNT
kilogram of TNT
Units: tonne (metric) of TNT  / ton of TNT  / kilogram of TNT
» show »

Oil Energy Equivalent

gigatonne of oil equivalent (Gtoe)
megatonne of oil equivalent (Mtoe)
tonne of oil equivalent (toe)
billion barrel of oil equivalent (BBOE)
kilobarrel of oil equivalent (kBOE)
barrel of oil equivalent (BOE)
Units: gigatonne of oil equivalent (Gtoe)  / megatonne of oil equivalent (Mtoe)  / tonne of oil equivalent (toe)  / billion barrel of oil equivalent (BBOE)  / kilobarrel of oil equivalent (kBOE)  / barrel of oil equivalent (BOE)
» show »

Natural Gas Energy Equivalent

Natural gas is measured in normal cubic meters (corresponding to 0°C at 101.325 kPa) or in standard cubic feet (corresponding to 60°F/16°C and 14.73 psi)
million of normal cubic meters of natural gas
million of standard cubic feet of natural gas
thousand of normal cubic meters of natural gas
thousand of standard cubic feet of natural gas
normal cubic meter of natural gas
standard cubic foot of natural gas
Units: million of normal cubic meters of natural gas  / million of standard cubic feet of natural gas  / thousand of normal cubic meters of natural gas  / thousand of standard cubic feet of natural gas  / normal cubic meter of natural gas  / standard cubic foot of natural gas
» show »

Liquefied Natural Gas Energy Equivalent

Energy value of a liquefied natural gas depends on the source of the gas and he process that is used to liquefy the gas. We provide conversion for a typical energy value. The actual energy may vary up to 15%.

Higher heating value includes the energy of water vaporization. Lower heating value considers vapor not to be useful and does not count its energy.

one kilogram of liquefied natural gas, higher heating value
one kilogram of liquefied natural gas, lower heating value
one pound of liquefied natural gas, higher heating value
one pound of liquefied natural gas, lower heating value
one liter of liquefied natural gas, higher heating value
one liter of liquefied natural gas, lower heating value
Units: one kilogram of liquefied natural gas, higher heating value  / one kilogram of liquefied natural gas, lower heating value  / one pound of liquefied natural gas, higher heating value  / one pound of liquefied natural gas, lower heating value  / one liter of liquefied natural gas, higher heating value  / one liter of liquefied natural gas, lower heating value
» show »

Coal Energy Equivalent

gigatonne of coal equivalent (Gtce)
megatonne of coal equivalent (Mtce)
tonne of coal equivalent (tce)
Tonne of Russian fuel equivalent unit
Russian fuel equivalent unit
Units: gigatonne of coal equivalent (Gtce)  / megatonne of coal equivalent (Mtce)  / tonne of coal equivalent (tce)  / Tonne of Russian fuel equivalent unit  / Russian fuel equivalent unit
» show »

Natural units

In physics, natural units are physical units of measurement based only on universal physical constants. The origin of their definition comes only from properties of nature and not from any human construct.
Planck energy (L²MT⁻²)
Units: Planck energy (L²MT⁻²)

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