CrownMass is a comprehensive fuels management tool that can: 1) Determine fuel loading for debris from crowns,boles, and tops. 2) Determine crown mass and the stand's susceptibility to crown fires. 3) Predict fire behavior in resultant fuelbed include crown fire potential. 4) Predict fire effects including probability of tree mortality. 5) Easily generate and print reports and graphs. 6) Quickly generate sampling statistical graphs. 7) Import tree information from Forest Vegetation Simulator output and other sources. CrownMass is part of the FMAPlus fuels management software package.