Normal human body temperature
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Normal human body temperature is a concept that depends on the place in the body at which the measurement is made. The value of 36.8 °C ±0.7 °C, or 98.2 °F ±1.3 °F. is the common oral measurement. Rectal measurements, or measurements taken directly inside the body cavity, are typically about a half degree (C) higher. Body temperature of an individual also tends to vary during the day and with activity level, with the lowest value immediately after awakening.
In the United States, normal human body temperature is commonly quoted as 98.6 °F which is an exact conversion of 37.0 °C. In Russia, the commonly quoted value is 36.6 °C (97.88 °F). These values appear to be the result of the same classic German study that found the average body temperature of healthy humans is 36.6 °C. Because of the normal variation in human body temperature, this value would properly be rounded to 37 °C or 98 °F. One commonly cited normal range for human body temperature is 36.4 – 37.1 °C (97.5 – 98.8 °F).
