The Energy in Firewood calculator estimates the energy (BTUs) in an amount seasoned(dried) firewood based on the dimensions of the stack which is used to compute the volume of firewood.

INSTRUCTIONS: Choose units and enter the following:

• (L) Length of Firewood Stack.
• (W) Width of Firewood Stack.
• (H) Height of Firewood Stack.

Firewood Energy (E): The calculator returns energy in BTUs. 

The Math / Science

A cord of firewood is a relatively well stacked (tight) pile of firewood measured 4 feet high, 4 feet wide and 8 feet long.

According to Michigan State University Extension office, there is 20 million BTUs in:

• one cord of firewood.
• 145 gallons of #2 fuel oil or
• 215 gallons of LP gas

That’s 156,250 BTUs per cubic foot of firewood.

Firewood Calculators

• Compute the Cords of Firewood in a stack.
• Compute the Cost of Firewood based on a stack and the paid price.
• Estimate the Time to Stack Firewood
• Estimate the Calories burned Stacking Fire wood
• Energy in a Stack of Firewood (BTUs)
• How Long Firewood will Last
• Firewood Cords in a Loose Pile