почему́ vs из-за чего́

pochemu vs iz-za chego — why vs because of what

What it really means

Почему́ is the broad, neutral question word for “why?” It can ask about a cause, reason, or explanation and is the normal choice in everyday conversation. It does not itself specify whether the reason is a person, event, circumstance, or purpose.

Из-за чего́ is more concrete: literally “because of what?” The preposition из-за normally introduces an unfavorable or problematic cause and governs the genitive case. It is useful when asking what specific circumstance caused a result, while почему́ is usually less pointed and more flexible.

Examples in natural speech

Почему́ ты так ду́маешь?
Why do you think so?
Почему́ заня́тия отменили́?
Why were the classes cancelled?
Из-за чего́ произошла́ заде́ржка?
What caused the delay?
Из-за чего́ вы поссо́рились?
What caused you to quarrel?
Мы опозда́ли из-за пробки́.
We were late because of a traffic jam.

Common mistakes

Do not use из-за чего́ for every “why”: it strongly suggests a concrete, often negative cause. Use почему́ for a general explanation, and keep the noun after из-за in the genitive: из-за дождя́, not из-за дождь.

Memory tip

Почему́ asks for the reason broadly; из-за чего́ points a finger at the causing circumstance.

Frequently asked questions

Is из-за чего́ always negative?

Usually it introduces an unwanted obstacle or cause, though context can make it neutral; из-за often has a negative connotation.

What case follows из-за?

Из-за governs the genitive: из-за шу́ма, из-за погоды́, and из-за чего́.

Can I answer почему́ with из-за?

Yes: Почему́ ты опозда́л? — Из-за пробки́. The question and answer use different but compatible constructions.

Note: This site uses JavaScript for interactive drills, audio playback, and progress tracking. Please enable JavaScript for the full experience.