摄氏温标是世界上普遍使用的温标，符号为℃ 或 °C，属于公制单位。

摄氏温标的规定是：在标准大气压，纯水的凝固点（即固液共存的温度）为0℃，水的沸点为100℃，中间划分为100等份，每等份为1℃。

Celsius, historically known as centigrade, is a scale and unit of measurement for temperature. As an SI derived unit, it is used by most countries in the world. It is named after the Swedish astronomer Anders Celsius (1701–1744), who developed a similar temperature scale. The degree Celsius (°C) can refer to a specific temperature on the Celsius scale as well as a unit to indicate a temperature interval, a difference between two temperatures or an uncertainty. Before being renamed to honour Anders Celsius in 1948, the unit was called centigrade, from the Latin centum, which means 100, and gradus, which means steps.