Through partnership with the University of Cincinnati, the NIOSH Skin Permeation Calculator has been updated with enhanced features and a new user interface. The improved calculator allows for simulation of typical occupational exposure scenarios. The calculator estimates fluxes, skin concentrations, and amounts absorbed from any size dose applied to partially or fully hydrated skin. The calculator is available on the NIOSH Web site at http://www.cdc.gov/niosh/topics/skin/finiteSkinPermCalc.html