Informal workplace learning has become a prominent reality in the knowledge society of today. For this reason, developing appropriate learning conditions in order to enhance workplace learning is dominating organizational agendas. However, research that investigates the relationship between important learning conditions and learning outcomes resulting from informal learning is scarce. Therefore, the main purpose of this study is to explore how learning conditions in the workplace are related to these informal learning outcomes of police inspectors in particular. A mixed method study, including a survey among 390 police inspectors and interviews with nine police inspectors, was set up to explore this relation. Overall, the results of the survey study suggest that the learning conditions "information", "feedback", "reflection" and"'coaching" are good predictors for the acquisition of "generic learning outcomes" and "organizational level learning outcomes". The learning condition "coaching" is also strongly associated with "job-specific learning outcomes". These results are in accordance with the perception of the interviewed police inspectors.