Geotechnical design is important to ensure good stability and bearing capacity of the ground. A part of this is to make good forecasts of future settlements. Nowadays most calculations are made in computer programs, such as Novapoint Geosuite Settlement. Geosuite Settlement includes a variety of calculation models, where some of the models include an addition of creep behaviour. The main purpose of this diploma work is to compare the results from different geotechnical settlement calculation models in Geosuite Settlement. As a reference object, an undrained test bank on clay in Lilla Mellösa outside of the community Upplands Väsby was selected. On this test site, the Swedish Geotechnical Institute (SGI) has performed measurements of long-term settlements since 1947. The result of this diploma work shows that the calculation models containing creep give result more like the measured settlements, than the calculation models that do not include creep. Despite of this, the measured settlement is greater than the settlement in calculation models containing creep. The most remarkable in this work are high excess pore pressures when using models containing creep. These excess pore pressure, in the result of this work, also decreases very slowly in time. One conclusion of this diploma work, based on the obtained results of this study, in comparison with other studies, is to use a calculation model containing creep, if the conditions are similar to those at the test site Lilla Mellösa.