Purple sweet potatoes are good sources of nutritions with medicinal properties. Sweet potatoes are used to produce noodles, bread, jams, chips, confectionery, dyes and drinks. Osmotic dehydration is a method applied to lower the water activity and extend the shelf life of the plant. Calcium is the firming agent, which can maintain the firmness of the food. As a fresh produce, sweet potatoes are short in shelf life. In this study, the sweet potatoes are dehydrated in the different concentrations of calcium infused osmotic solutions.