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Fahrenheit (F) → Celsius (C)

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Use our free online converter to convert between units instantly. Enter any value in the field above to get accurate results. No signup or download required—all conversions run in your browser. Our calculator uses standard conversion factors for reliability.

-17.8°

❄️ Water freezing

F°=C°
0=-17.777778
5=-15
10=-12.222222
15=-9.444444
20=-6.666667
25=-3.888889
30=-1.111111
37=2.777778
50=10
100=37.777778

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Brief explanation: Fahrenheit to Celsius

Celsius (C) is used globally for weather and daily life. Fahrenheit (F) is common in the USA. Kelvin (K) is used in science. Water boils at 100°C/212°F and freezes at 0°C/32°F. Normal body temperature is about 37°C or 98.6°F. To convert Celsius to Fahrenheit: multiply by 9/5 and add 32. To convert Fahrenheit to Celsius: subtract 32 and multiply by 5/9.

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Common conversion examples: Fahrenheit to Celsius

Reference values for quick comparison. Use the converter above for any amount.

  • 32 Fahrenheit=0 Celsius
  • 77 Fahrenheit=25 Celsius
  • 212 Fahrenheit=100 Celsius

About the Units

Fahrenheit (F)

Definition: Fahrenheit (°F) is a temperature scale where water freezes at 32°F and boils at 212°F. It is used primarily in the United States for weather, cooking, and some industrial applications.
History: Daniel Gabriel Fahrenheit proposed the scale in 1724. He set 0°F at the coldest mixture he could create and 96°F at human body temperature. The scale was later recalibrated using water's freezing and boiling points.
Current use: Fahrenheit is used for weather forecasts and cooking in the US. Oven temperatures and thermostats in the US often use Fahrenheit. Most other countries use Celsius.

Celsius (C)

Definition: Celsius (°C) is a temperature scale where water freezes at 0°C and boils at 100°C at standard atmospheric pressure. It is the standard temperature unit in the metric system and most of the world.
History: The Celsius scale was developed by Anders Celsius in 1742. It was originally reversed (0 for boiling, 100 for freezing) until Jean-Pierre Christin inverted it. It is also called centigrade.
Current use: Celsius is used for weather, cooking, and science worldwide. Oven temperatures, body temperature, and climate data use Celsius. The US is the main holdout, using Fahrenheit for weather.

Sources

Celsius and Fahrenheit are the most common temperature scales. Use this when reading weather abroad, setting oven temperatures, or comparing climate data. Water freezes at 0°C (32°F) and boils at 100°C (212°F).

Conversion factors and unit definitions follow international standards. For authoritative references, see: