How do you say in German hello how are you?

Answer 1

hallo, wie geht es Ihnen? means "hello how are you?" and guten Tag is "good day"

The more informal way is: wie geht's?

Answer 2

"Hello, how are you?" in German is "Hallo, wie geht es ihnen?"

Answer 3

Hello, how are you doing today? = Hallo, wie geht's dir heute? (informal)

Hello, how are you doing today? = Hallo, wie geht's Ihnen heute? (formal)