The objective of this study was to evaluate a computer based interactive diabetes education program designed to train patients with diabetes to correctly estimate the energy or carbohydrate contents of foods. The acceptance and the operator convenience of the program were evaluated with an integrated program and written questionnaires. The training success was calculated for each user from the data sets after multiple repetitions of the same exercise. Age, weight, type of diabetes, previous training and computer experience of 126 patients with type 1 or 2 diabetes from three different German diabetes centres were documented. The evaluation of the computer program indicated a good acceptance and operator convenience. Moreover, there was a significant training success in patients who have never used a structured diabetes education program before. Therefore, the potential impact of the program is to support but not to replace structured diabetes education programs and to further motivate and attract patients to diabetes education programs.