My first thought when reading this was "Jesus Christ are Germany's PTO policies generous."

In nations that are more work-centric (eg. the US) the possible billable hours will be nontrivially higher and thus the hourly rate will be significantly lower.

For instance, I know people who get only 10 days off per year minus holidays, meaning that they take a maximum of 10 days per year total. This also entails working ~8 Saturdays per year, which comes out to roughly 1850 hours per year.

It seems as though this type of calculation will vary widely based on location.