What it means
だけあって expresses that a result is just what one would expect from a person's ability, a thing's quality, or a preceding fact. It often conveys recognition or admiration: because the stated basis is strong, the result naturally matches expectations. It follows nouns, the plain form of verbs, and plain adjectives; na-adjectives take な before it. The result is usually favorable, though the construction can also describe an expected negative result when the context supports it.
Usage note
だけあって is not a neutral equivalent of every causal expression such as から or ので. It normally highlights that the result is appropriate or unsurprising in light of the preceding basis, and it is often used with an appreciative or evaluative nuance.
How to use it
彼は専門家だけあって、説明がわかりやすいです。
As expected of an expert, his explanation is easy to understand.
この町は静かなだけあって、夜は宿泊客がよく眠れます。
As expected from this town being quiet, guests can sleep well at night.
この製品は軽いだけあって、長時間持っていても私は疲れにくいです。
As expected from this product being lightweight, I do not easily get tired even when holding it for a long time.
彼は毎日練習しているだけあって、本番でも落ち着いていました。
As expected from practicing every day, he remained calm even in the actual performance.
彼は専門家だけあって、説明がわかりやすい。
As expected of an expert, his explanation is easy to understand.
この町は静かなだけあって、夜は宿泊客がよく眠れる。
As expected from this town being quiet, guests can sleep well at night.
この製品は軽いだけあって、長時間持っていても私は疲れにくい。
As expected from this product being lightweight, I do not easily get tired even when holding it for a long time.
彼は毎日練習しているだけあって、本番でも落ち着いていた。
As expected from practicing every day, he remained calm even in the actual performance.