Convert Energy and Work Units Instantly

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1 Browse through the page and find the unit you want to convert from.
Type the value you are converting next to the unit.
2 Click the Convert button.
Your value gets instantly converted to all other units on the page.
3 Now find the unit you want and get the conversion result next to it. It's your answer.

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  1. Find your unit.
  2. Type your value next to it.
  3. Touch "Convert Me" and get all conversions.

International System (SI)

megajoule (MJ)
kilojoule (kJ)
joule (J)

British and American

British Thermal Unit (BTU)
Million BTU (MMBTU)
Foot-Pound (ft*lbs)

Common Units

megacalorie (Mcal)
kilocalorie (kcal)
metre-kilogram (mkg)
calorie (cal)
kilowatt hour (kW*h)
watt hour (W*h)
watt second (W*s)
electronvolt (eV)

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 psia)
standard cubic foot of natural gas
normal cubic meter of natural gas
thousand of standard cubic feet of natural gas
thousand of normal cubic meters of natural gas
million of standard cubic feet of natural gas
million of normal cubic meters of natural gas

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)

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! The conversion is approximate.
Either the unit does not have an exact value,
or the exact value is unknown.
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Without the substance conversion to some units cannot be calculated.
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Hint: Can't figure out where to look for your unit? Try searching for the unit name. The search box is in the top right corner of the page.
Has really existed since 1996? In fact it's even older. We launched the first version of our online units converter in 1995. There was no JavaScript there and all conversions had to be done on server. The service was slow. A year later the technology allowed us to create an instant units conversion service that became the prototype of what you see now.
To conserve space on the page some units block may display collapsed. Tap any unit block header to expand/collapse it.
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