"मैं बाद में खाऊँगा।"

Translation: I will eat later.

[yhagood]

Why is में needed?

[yuhua1a]

From what I can tell, बाद is a postposition, so it takes an object (e.g. "after you" or "one day later") while बाद में is an adverb, so you can use it by itself. I could be completely wrong though.

The same question popped up here: https://forum.duolingo.com/comment/37588362

[dhanalaksh395031]

Why mein here??

[ziliya]

Ah so ब‌ाद is just like Arabic بعد

[derliesl]

This is something a male would say, right?