The energy content of wood is typically measured in British Thermal Units (BTUs) or MegaJoules (MJ) per cord or per unit of weight. The energy content can vary significantly depending on the type of wood, its moisture content, and how it is burned.

Here are some general estimates of the energy content of common types of firewood:

  • Oak: 24-28 million BTUs per cord
  • Hickory: 24-28 million BTUs per cord
  • Maple: 18-26 million BTUs per cord
  • Ash: 20-24 million BTUs per cord
  • Cherry: 20-22 million BTUs per cord
  • Birch: 20-22 million BTUs per cord
  • Pine: 14-16 million BTUs per cord

It is important to note that these estimates are generalizations and can vary depending on a number of factors