Calculate the volume of a stacked woodpile in cords, based on its length, height, and depth.
The Firewood Calculator converts the dimensions of a stacked woodpile into the standard firewood unit — the cord.
A full cord is a stack measuring 4 ft × 4 ft × 8 ft, or 128 cubic feet of stacked wood, including the small air gaps between logs.
Volume (cubic ft) = Length × Height × Width. Cords = Volume ÷ 128.
A stack 8 ft long, 4 ft high, and 4 ft deep equals 128 cubic feet — exactly 1 full cord of firewood.
It estimates based on your heating needs (or burn hours) per season, the wood type's heat output, and typically expresses the result in "cords" (a standard stacked volume of 128 cubic feet).
A standard cord measures 4 feet high × 4 feet wide × 8 feet long (128 cubic feet) of stacked firewood.
Yes — dense hardwoods (like oak) produce more heat per cord than softer woods (like pine), so wood species affects how much you'll need to burn for the same heat output.