100 °F = 37.8 °C
100 degrees Fahrenheit is 37.777778 degrees Celsius, to six decimal places.
- Precise
- 37.777778 °C
- Rounded
- 37.8 °C
- Formula
- (100 − 32) × 5/9
Convert any other temperature
Type in either box; the other follows, and the scale moves with it. Works for decimals and, for temperatures, numbers below zero.
Around 100 °F
Fahrenheit to Celsius for the whole numbers either side of 100, rounded to one decimal place. Each row opens its own page.
| Degrees Fahrenheit | Degrees Celsius |
|---|---|
| 95 °F | 35 °C |
| 96 °F | 35.6 °C |
| 97 °F | 36.1 °C |
| 98 °F | 36.7 °C |
| 99 °F | 37.2 °C |
| 100 °F | 37.8 °C |
| 101 °F | 38.3 °C |
| 102 °F | 38.9 °C |
| 103 °F | 39.4 °C |
| 104 °F | 40 °C |
| 105 °F | 40.6 °C |
How to convert Fahrenheit to Celsius
The formula
°C = (°F − 32) × 5/9. The two scales start from different zero points, so there is a subtraction as well as a multiplication.
Worked through for 100
Subtract 32: 100 − 32 = 68. Multiply by 5/9: 68 × 5 ÷ 9 = 37.777778. Rounded, that is 37.8 °C.
In your head
Take away 30 and halve it: 70 °F → 40 ÷ 2 = 20 °C (close enough for weather).
Questions
What is 100 °F in Celsius?
100 degrees Fahrenheit is 37.777778 degrees Celsius to six decimal places, or 37.8 °C rounded to one decimal place.
How do you convert degrees Fahrenheit to degrees Celsius?
Use (100 − 32) × 5/9, which gives 37.777778. For a quick estimate: Take away 30 and halve it: 70 °F → 40 ÷ 2 = 20 °C (close enough for weather).
Is 100 °F hot or cold?
100 °F is 37.8 °C: a fever if it is a body temperature, and a heatwave as weather.
What is 100 °C in Fahrenheit?
Going the other way, 100 °C is 212 °F. The reverse conversion has its own page and converter.
Is the answer exact?
The exact answer has endless decimals, so it is shown to six places (37.777778). The rounded figure, 37.8, is accurate enough for weather, cooking and thermometers.