cost performance; cost effectiveness; price-performance ratio
Refers to the objective ratio of cost to performance or effectiveness, often used in product comparisons and business analysis.
See also: コストパフォーマンス
This smartphone has great cost performance.
value for money; bang for one's buck
More subjective and colloquial than sense 1; used when something feels like a good deal or worth the price in everyday situations.
This lunch is the best bang for your buck.
We selected parts with an emphasis on cost effectiveness.
コスパのいい居酒屋を見つけた。
I found an izakaya with great value for money.