What is a human's body temperature in degrees Celsius?

• A. 35 degrees Celsius
• B. 37 degrees Celsius
• C. 39 degrees Celsius
• D. 33 degrees Celsius

Answer: (B)

Normal body temperature for a healthy adult is about 37°C, roughly 98.6°F. In real life, the normal range is a bit broader—about 36.1°C to 37.2°C—because it can vary with the time of day, activity, age, and where the temperature is measured (rectal, oral, ear, etc.). 37°C is the standard reference point for a typical, resting core temperature. Values higher than that, like 39°C, suggest fever or illness, while values much lower, such as 35°C or 33°C, indicate hypothermia. So 37°C best represents the typical normal body temperature.