ガス代 ガスだい Meanings Noun gas bill gasoline bill; petrol bill See also: ガソリン代 (ガソリンだい). Kanji 代 era. Read as ダイ. Example sentences 毎月のガス代はいくらですか。How much is your monthly gas bill? 先月のガス代がすごく高かったんだ。My gas bill for last month was very high. Jinuma: Japanese Dictionary · Word lists