Degrees Fahrenheit to Degrees Celsius (°F to °C) Converter
To convert Fahrenheit to Celsius, use °C = (°F − 32) × 5/9. For example, 20 °F = -6.6667 °C.
Quick facts
- Formula: °C = (°F − 32) × 5/9
- Water freezes at 0 °C and boils at 100 °C (at sea level).
- Normal body temperature is about 37 °C.
- −40 is the same in Celsius and Fahrenheit.
How to convert degrees Fahrenheit to degrees Celsius
Temperature scales have different zero points, so you cannot just multiply: you need the offset as well as the multiplier.
Worked example: 25 °F = -3.88889 °C.
Source: BIPM, The International System of Units (SI Brochure, 9th edition, 2019), for the kelvin and degree Celsius.
Degrees Fahrenheit to Degrees Celsius conversion table
| Degrees Fahrenheit [°F] | Degrees Celsius [°C] |
|---|---|
| -40 °F | -40 °C |
| -20 °F | -28.889 °C |
| -10 °F | -23.333 °C |
| 0 °F | -17.778 °C |
| 10 °F | -12.222 °C |
| 20 °F | -6.6667 °C |
| 25 °F | -3.8889 °C |
| 30 °F | -1.1111 °C |
| 37 °F | 2.7778 °C |
| 40 °F | 4.4444 °C |
| 50 °F | 10 °C |
| 100 °F | 37.778 °C |
Degrees Fahrenheit vs Degrees Celsius
| Fahrenheit | Celsius | |
|---|---|---|
| Symbol | °F | °C |
What is a Fahrenheit?
A scale where water freezes at 32° and boils at 212° at standard atmospheric pressure. Used for weather and everyday temperature in the United States.
What is a Celsius?
A scale where water freezes at 0° and boils at 100° at standard atmospheric pressure. The standard temperature scale for weather, cooking, and science in most of the world.
Frequently asked questions
What is the formula to convert Fahrenheit to Celsius?
°C = (°F − 32) × 5/9. This conversion needs an offset as well as a multiplier because the scales have different zero points.
What is 0 °F in °C?
0 °F = -17.7778 °C.
What is 100 °F in degrees Celsius?
100 °F = 37.7778 °C.
What is 37 °F in °C?
37 °F = 2.7778 °C.
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