Static drop formation on downward-facing nozzles was investigated, numerically and experimentally. A representation of the variation of the contact angle with respect to nozzle diameter and increasing drop volume, during quasistatic drop formation, was determined and experimentally verified. The condition for the formation of single drops is given. It is pointed out that this limit exists for dynamic drop formation on downward-facing nozzles. This formation is treated in an integral manner and the results are presented in an Ohnesorge-Reynolds diagram. The latter diagram is explained in detail, since it allows a generalization of the authors' experimental results. Experiments and corresponding theoretical results are described and show very good agreement.