The ideal temperature is the temperature range in which the human body is thought to be most efficient and comfortable. It lies between the range of 20 to 26 degrees Celsius or 68 to 79 degrees Fahrenheit; however, it is generally believed it is 25 degrees Celsius (73 degrees Fahrenheit).
A number of studies have been conducted to find out the optimal temperature for the human body. Most of these studies concluded that the ideal temperature lies within the range of 21 to 23 degrees Celsius (70 to 73 degrees Fahrenheit). A study conducted by Cornell University yielded a result of 25 degrees Celsius (77 degrees Fahrenheit) as being the ideal temperature.