Digital thermometers used for reading body temperatures usually can’t go as high as ones designed for cooking. Most of them will max out at 109 or 110 degrees Fahrenheit. Most body thermometers will give you a number with one decimal place, such as 98.6. (Some basal body thermometers, often used for tracking fertility, go to two decimal places.)
It depends on age, time of day, and other factors, but in general:
- A temperature between 97 and 99 degrees is considered normal
- A temperature between 99 degrees and 100.3 degrees is considered a low-grade fever
- A temperature of 100.4 degrees or higher is considered a fever