As of Version 9.0, unit functionality is built into the Wolfram Language

is a unit of energy.


  • To use , you first need to load the Units Package using Needs["Units`"].
  • is an abbreviation for BritishThermalUnit.
  • is equivalent to approximately 1055.06 Joule (SI units).
  • Convert[n BTU,newunits] converts n BTU to a form involving units newunits.
  • is written in the literature as Btu.
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