이 얼마나

how much; how much of a...; how...

→ 이

phrase Common #4,391

how much; how much of a...; how... Used to express degree or amount, often in rhetorical or emphatic questions. The exact meaning depends on the context that follows.

KO: 이 얼마나 힘든 일인지 몰라요.

EN: You have no idea how hard this is.

톰이 얼마나 보스턴에 있을지 알아?

Do you know how long Tom will be in Boston?

여기 서 빌어먹을 공항이 얼마나 먼 줄 아나?

Do you know how far the fucking airport is from here?

— 이탈자 (1990)