This user manual describes how to use the computer program SWERISK version 1.1.0. Example results and figures are shown to easier understand how to use the program. SWERISK is a computer program for calculating the probability of a human being hit and injured by fragments from a detonating warhead. Risk distances are calculated for a standing civilian without protection. The user selects a warhead and places it at any height, attitude and velocity. Results are presented either in a 2D view or on a loaded map. There is also an opportunity to take into account the effects of the terrain through loading elevation data. Elevation data can also be complemented with customized barriers around the warhead. Example of results and methods are described in these report.