Clinical Temperature Reference
| CONDITION | CELSIUS | FAHRENHEIT |
|---|---|---|
| Hypothermia | below 35° | below 95° |
| Low Normal | 35° – 36.1° | 95° – 97° |
| Normal | 36.1° – 37.2° | 97° – 99° |
| Low Fever | 37.2° – 38° | 99° – 100.4° |
| Fever | 38° – 39.4° | 100.4° – 102.9° |
| High Fever | above 39.4° | above 102.9° |
Frequently Asked Questions
What is core body temperature?
Normal core body temperature for a healthy adult is 37°C (98.6°F). In practice, it can vary between 36.1°C and 37.2°C (97–99°F) throughout the day.
What temperature is considered a fever?
A fever is generally defined as a body temperature at or above 38°C (100.4°F). A high fever is above 39.4°C (103°F).
Which thermometer site gives the most accurate reading?
Rectal temperature is the most accurate, especially for infants. Oral and tympanic (ear) are standard for adults. Axillary (armpit) readings are typically 0.5°C lower than oral.
What is hypothermia?
Hypothermia is a medical emergency where body temperature drops below 35°C (95°F). Severe hypothermia is defined as below 28°C (82.4°F) and is immediately life-threatening.
What is the Newton temperature scale?
The Newton scale is an 18th-century historical scale proposed by Isaac Newton. Water freezes at 0°N and boils at 33°N. It is not used in modern medicine.