Wood Pellet Production Calculator

Wood pellet production turns raw, wet feedstock -- sawmill residue, forest slash, or purpose-grown biomass -- into a dense, uniform fuel by removing moisture and compressing the dried material through a pellet mill die. This calculator walks through the two main yield losses in that process. First, drying: green wood commonly arrives at 40-55% moisture on a wet-weight basis, and every pound of that water has to be evaporated before pelletizing, so a raw wood input is first reduced to its dry-wood weight by subtracting the moisture fraction. Second, conversion efficiency: not all of that dry wood becomes finished pellets -- some is lost as fines, dust, bark, and other material that doesn't densify cleanly through the die, so a conversion-efficiency percentage (commonly 80-95% for a well-run mill) scales dry wood down to actual pellet output.

The energy content figure applies a commonly cited industry benchmark of about 16.5 million BTU per ton for quality wood pellets finished to the 5-10% moisture range required by standards like the Pellet Fuels Institute (PFI) and ENplus programs -- both specify calorific value floors in roughly that neighborhood, but in different units and not at the same number: PFI's benchmark is commonly cited in MMBtu/ton, while ENplus specifies a metric minimum of 16.5 MJ/kg. Converting 16.5 MMBtu per short ton gives about 19.2 MJ/kg (1 MMBtu ≈ 1055.06 MJ, 1 short ton ≈ 907.185 kg), roughly 16% higher than ENplus's 16.5 MJ/kg floor -- the two figures are independently-cited benchmarks from different standards, not unit conversions of the same value. Real-world energy content varies somewhat by wood species and exact finished moisture, so this energy figure is best used for planning purposes, not as a stand-in for a certified fuel-value test result.