Spreadsheets are familiar to computer users and its widely used in the areas of mathematical calculations, engineering, and other fields. Spreadsheets are also helpful in understanding physics through graphs and simulations for example to simulate the strain in a creep test (constant stress) in the Kelvin model. This study has been designed using a spreadsheet to analyze the strain in a creep test in the Kelvin model. Based on the data and graph, it is found that the strain value depends on the temperature. Experimental activities in physics lessons can be carried out away from laboratories using computer-based simulations, such as spreadsheets. Such simulations can be made by students thus can improve students' understanding and motivate to study physics.