[Japanese] How to ask for the name in kanji
I want to ask my teacher how to write his name in kanji and this sentence came to my mind:
あなたのなまえかんじではどうかきますか。

Is it right?
Are there other ways to ask about it?
Is it formal enough to talk to my teacher?

Question

[Japanese] How to ask for the name in kanji
I want to ask my teacher how to write his name in kanji and this sentence came to my mind:
あなたのなまえかんじではどうかきますか。

Is it right?
Are there other ways to ask about it?
Is it formal enough to talk to my teacher?

Answer

Es perfecto.

O  "あなたの なまえを かんじでは どう（どのように）かきますか？"

"なまえを かんじでかくと どう（どのように）かきますか？"

"どう", también es posible que, en otras palabras, "どのように".

Answer

Para tu profesor@, sería mejor preguntarle せんせいのおなまえは en vez de あなたの, y なまえ con お para hacer sustantivo cortés, es nuestro costumbre. (Tenemos ご también para hacerlo como ごはん (= arroz hecho, 3 comidas principales al día).)

Yo peguntaría:
せんせいのの おなまえは かんじで どう / どのように かきますか。
せんせいの おなまえの かんじを おしえてください。
(= Muéstrame / Enséñame los kanjis para su nombre, por favor.)

Espero que te ayude.

Answer

"How is your name written in Kanji?"は「（あなたの）お名前は漢字でどう書きますか」になると思います。
I'm not a native speaker but I am confident about this being one of the correct ways of saying it.

Answer

Thanks, wat. That was really helpful. I'll try to omit "anata" from now on.

Answer

We never use 'あなた' in daily conversations. It does not equal 'you' at all. 
Please forget this word and use the name of the person you're talking to, instead.
For example, if you're talking to a teacher named Yamada, say 'やまださん の なまえは...'
Using their names instead of the word あなた will make your Japanese much better.
あなた sounds really rude.

In this case, you're talking to your teacher it's better to say おなまえ は かんじ で どう かきますか.
You don't have to say a word for 'your' because it's obvious from the context.