Body Temperature Calculator
Enter your body temperature to convert between °C and °F and get an instant interpretation — from hypothermia to high fever.
Results
°C
37.0°F
98.6Interpretation
NormalTemperature is within the healthy range (36.1–37.2 °C / 97–99 °F). No action needed.
Temperature Reference Ranges
| Category | Range |
|---|---|
| Hypothermia | < 34.9 °C / 94.8 °F |
| Below normal | 35–36 °C / 95.0–96.8 °F |
| Normal | 36.1–37.2 °C / 97.0–99.0 °F |
| Elevated | 37.3–38 °C / 99.1–100.4 °F |
| Fever | 38.1–39 °C / 100.6–102.2 °F |
| High fever | 39.1–40 °C / 102.4–104.0 °F |
| Very high fever | > 40.1 °C / 104.2 °F |
What You Should Know
Measurement sites
Normal temperature varies by measurement site: rectal (36.6–38 °C), oral (35.5–37.5 °C), axillary (34.7–37.3 °C), and tympanic (35.8–38 °C). Rectal measurement is most accurate.
Natural variation
Body temperature fluctuates by up to 0.5 °C throughout the day. It is lowest in the early morning and peaks in the late afternoon. Ovulation also raises temperature slightly.
When to act on fever
Fever above 38 °C (100.4 °F) in adults lasting more than 3 days, or above 39 °C (102.2 °F) at any age, warrants medical evaluation. Any fever in infants under 3 months needs immediate attention.
Hypothermia risk
Hypothermia occurs when body temperature drops below 35 °C (95 °F). Causes include cold exposure, immersion in cold water, and certain medical conditions. It is a medical emergency.
Medical disclaimer: This calculator is for informational purposes only and does not constitute medical advice. If you are concerned about a fever or low body temperature, consult a healthcare professional.
Read more
Body Temperature Calculator — Fever, Normal Range & Hypothermia →What is a normal body temperature? Learn about fever, hypothermia, temperature variation by site, and when to see a doctor. With free body temperature calculator.