As of Version 9.0, unit functionality is built into the Wolfram Language »
Details and Options
- To use BTU, you first need to load the Units Package using Needs["Units`"].
- BTU is an abbreviation for BritishThermalUnit.
- BTU is equivalent to approximately 1055.06 Joule (SI units).
- Convert[n BTU,newunits] converts n BTU to a form involving units newunits.
- BTU is written in the literature as Btu.