100 °F to Celsius.
100 °F = 37.78 °C.
What 100 °F means
- 100 °F is 68 °F above the freezing point of water (0 °C, 32 °F).
- 100 °F is 1.4 °F above the generally accepted average normal body temperature (37 °C, 98.6 °F).
- 100 °F is 112 °F below the boiling point of water at sea level, rounded to 100 °C (212 °F).
- In humid air, 100 °F feels hotter. Use the heat index calculator to see how hot.
How to convert
- Subtract 32: 100 − 32 = 68.
- Multiply by 5/9: 68 × 5/9 = 37.78 °C.
To convert the other way, use the Celsius to Fahrenheit converter.
Nearby values
| Fahrenheit | Celsius |
|---|---|
| 95 °F | 35 °C |
| 96 °F | 35.56 °C |
| 97 °F | 36.11 °C |
| 98 °F | 36.67 °C |
| 99 °F | 37.22 °C |
| 100 °F | 37.78 °C |
| 101 °F | 38.33 °C |
| 102 °F | 38.89 °C |
| 103 °F | 39.44 °C |
| 104 °F | 40 °C |
| 105 °F | 40.56 °C |
Questions people ask
What is 100 °F in °C?
100 °F is 37.78 °C.
Is 100 °F above body temperature?
Yes. It is 1.4 °F above it. The generally accepted average normal body temperature is 37 °C (98.6 °F).
How do I estimate 100 °F in °C in my head?
Take away 30 and halve. That gives 35 °C. The exact value is 37.78 °C, so the error is 2.8 °C.
Is 100 °F a fever?
CDC guidance for reporting ill travelers counts a measured temperature of 38 °C (100.4 °F) or more as a fever. 100 °F is below that value. Ask a health care provider about a fever.
Sources: °F = °C × 9/5 + 32, exact (NIST SP 811); body temperature: MedlinePlus (NIH): Body temperature norms; fever: CDC guidance for ill travelers.
Sources & verification
Unit definitions used by this converter:
- Temperature scales: T/K = t/°C + 273.15; t/°C = (t/°F − 32)/1.8; T/K = (t/°F + 459.67)/1.8; °R = K × 9/5, exact — NIST SP 811, Appendix B.8
Other Fahrenheit to Celsius values
10 °F · 15 °F · 16 °F · 18 °F · 19 °F · 20 °F · 22 °F · 23 °F · 24 °F · 25 °F · 27 °F · 28 °F · 29 °F · 30 °F · 32 °F · 33 °F · 36 °F · 38 °F · 40 °F · 42 °F · 45 °F · 70 °F · 80 °F · 98.6 °F · 160 °F · 170 °F · 180 °F · 190 °F · 200 °F · 220 °F · 350 °F · 400 °F