-(으)ㄹ 만도 하다

Use -(으)ㄹ 만도 하다 to say that, given the circumstances, a reaction or result is understandable and not surprising.

능력·허락·의무Can, may & must

Han: To recommend something as worth doing, use -(으)ㄹ 만하다; -(으)ㄹ 만도 하다 means a reaction is understandable given the situation.

Examples

세 시간이나 기다렸으니 화가 날 만도 하지요.He waited a full three hours, so it's understandable that he got angry.

이제 연락이 올 만도 한데 아직 소식이 없어요.You'd expect to hear from them by now, but there's still no news.

밤새 일했으니 피곤할 만도 하네요.You worked all night, so no wonder you're tired.

그렇게 열심히 준비했으니 합격할 만도 했어요.She prepared so hard that it's no surprise she passed.

V/A+(으)ㄹ 만도 하다

화가 나다 → 화가 날 만도 하다; 피곤하다 → 피곤할 만도 하다; 먹다 → 먹을 만도 하다

It is an evaluation: the speaker judges something natural because of a reason, which is usually stated (often with -(으)니까 or -았/었으니) or clear from context.
For past situations, tense is usually marked on 하다: 화가 날 만도 했다.
It does not mean 'worth doing' (that is -(으)ㄹ 만하다) and is not used in commands or suggestions.
The form -(으)ㄹ 만도 한데 often means 'you would expect ~ by now, but…'.

Wrong: ~~이 책은 정말 재미있어서 읽을 만도 해요.~~

Right: 이 책은 정말 재미있어서 읽을 만해요.

To recommend something as worth doing, use -(으)ㄹ 만하다; -(으)ㄹ 만도 하다 means a reaction is understandable given the situation.

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