単価

1. Origins, structure, and basic meaning

• Structure: 単価 is read as たんか and is a noun for the price assigned to one unit of a product or material.
• Basic usage: Calculating a total appears in 個数に単価を掛ける, while negotiating the price appears in 材料の単価について交渉する.

2. Common pitfalls and similar expressions

• Price per unit
  • It is not the total for an entire quantity, but the price for one defined unit such as an item, weight, or length.
• Difference from 価格
  • Unlike the general word for price, this term necessarily includes a per-unit basis for calculation.