Traffic noise pollution is a growing problem that highly affects the health of people. To cope with this problem one has to regulate traffic or construct noise barriers. In order to implement effective measures against traffic noise the information about its distribution – noise maps - is imperative. This paper presents our work in creating a noise calculator software package implementation that can create noise maps. The noise calculator is based on the noise model described in Nordic prediction method for road traffic noise. As a case study, the noise calculator was used to build both large noise maps for Skåne region in south of Sweden and detailed noise maps for smaller areas in the city of Lund.