You're just confused by terminology. While 1 C is 273 K, 1 degree Celsius is 1 degree Kelvin. See, a degree is not an absolute unit of measure like a Celsius o

You're just confused by terminology. While 1 C is 273 K, 1 degree Celsius is 1 degree Kelvin. See, a degree is not an absolute unit of measure like a Celsius or a Kelvin, it's a relative difference between two absolute units of measure. When discussing the difference between two separate temperature readings measured in Celsius, degrees Celsius is entirely appropriate. Think of it like time: there is a difference between meeting at 2:00 and meeting two hours from now.