How many days you'll need for a trip to Germany depends on what you want to see and do. If you're only interested in visiting the major cities, such as Berlin, Munich, and Hamburg, you could probably get by with a week or less. But if you want to explore the countryside and visit some of the smaller towns and villages, you'll need at least two weeks. And if you want to really experience all that Germany has to offer, you could easily spend a month or more here.