Removing accumulations of woody biomass from the forest reduces fire fuel and provides wood for power generation and ethanol production. Is the value of the biomass high enough to cover the cost of removing it Forest managers can now use a computer spreadsheet tool to find out. The Western Biomass Tool estimates the costs of harvesting, chipping and transporting biomass. The Western Biomass Tool can also be used to calculate the cost of removal purely as a fuel-management measure. Both applications are valuable to managers who need to understand the economic viability of their proposed management activities. Funded through the Forest Service's National Fire Plan, development of the tool was a collaborative effort by Forest Service researchers and the University of Idaho.