Which Kelvin temperature most closely corresponds to human body temperature?

Normal human body temperature is considered to be 98.6°F (or 100°F for simplicity). Fahrenheit temperature can be converted to °C via the formula (°F) = (9/5)(°C) + 32. Solve to find °C = 38. Kelvin temperature is found simply by adding 273 to (°C). Hence, human body temperature is ca. 311 K.

273 K corresponds to 0°C, 298 K corresponds to room temperature (25°C), and 373 K corresponds to 100°C (212°F), the boiling point of water.