Body temperature: Celsius & Fahrenheit
37°C equals 98.6°F — the classic oral average. Use the chart below for nearby fever and low-temperature references. This page is educational, not medical advice.
| Reading | °C | °F | Note |
|---|---|---|---|
| Hypothermia risk | 35°C | 95°F | Seek urgent care if body temp is this low |
| Low-normal | 36.1°C | 97°F | Within common healthy range |
| Average oral | 37°C | 98.6°F | Traditional “normal” reference |
| Upper-normal | 37.2°C | 99°F | Still often considered normal |
| Low-grade fever | 38°C | 100.4°F | Common fever threshold |
| Moderate fever | 39°C | 102.2°F | Monitor symptoms closely |
| High fever | 40°C | 104°F | Medical advice recommended |
Convert any reading with the Celsius to Fahrenheit converter or the Fahrenheit to Celsius tool.
Frequently asked questions
Quick answers for the searches people make most.
What is normal body temperature in Celsius?
Many healthy oral readings fall between about 36.1°C and 37.2°C. 37°C (98.6°F) is the traditional average.
What Fahrenheit temperature is a fever?
A common threshold is 100.4°F (38°C), but guidance varies by age, measurement site, and clinical context.
Is 98.6°F always “normal”?
Not for everyone. Individual baselines differ, and temperature changes across the day. Treat 98.6°F / 37°C as a reference, not a rule.
Recommended thermometers
Handy tools if you convert temperatures often. Affiliate links — we may earn a commission (marked TODO until real tags are added).