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この本はいくらですか。
How much is this book?
price; cost
いくらですか?
How much is it?
この服はいくらでしたか。
How much was this clothing?
Used to ask about prices in shops, markets, or online stores.
amount; quantity
いくら払えばいいですか。
How much should I pay?
いくらでも構いません。
Any amount is fine.
Used to ask or state an unspecified amount.
In shops or formal settings, always add ですか when asking about prices (e.g., この本はいくらですか). In casual conversations with friends, you can drop ですか (e.g., これいくら?).
From the interrogative pronoun いくら, combining い (how) and くら (amount, quantity). The い is a variant of いか (how much), and くら is from くらい (amount).
いくら is used in both formal and informal contexts. In shops, it is polite to add ですか when asking about prices (e.g., いくらですか). In casual speech, dropping ですか is common (e.g., いくら?).