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Fahrenheit to Celsius Converter (°F to °C)

°C = °F × 0.5555555556 − 17.77777778. Type any value to convert Fahrenheit to Celsius.

1 °F = -17.22222222 °C

Formula: °C = °F × 0.5555555556 − 17.77777778

Common values
Decimals
In every unit 5 units
Degree Celsius (°C) -17.22222222 °C
Degree Fahrenheit (°F) 1 °F
Kelvin (K) 255.9277778 K
Degree Rankine (°R) 460.67 °R
Degree Réaumur (°Ré) -13.77777778 °Ré

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If you continue, the file is uploaded over an encrypted connection and converted on our server. You can keep using the site meanwhile. The original is deleted as soon as it is converted; the result is kept for 6 hours so you can download it, and you can delete it at any time. Files are never shared or used for anything else.

Calculated in your browser – nothing you type is sent anywhere. Privacy details

Fahrenheit to Celsius table

Formula: °C = °F × 0.5555555556 − 17.77777778

Degree Fahrenheit (°F)Degree Celsius (°C)
-40 °F-40 °C
-30 °F-34.44444444 °C
-20 °F-28.88888889 °C
-10 °F-23.33333333 °C
-5 °F-20.55555556 °C
0 °F-17.77777778 °C
5 °F-15 °C
10 °F-12.22222222 °C
15 °F-9.444444444 °C
20 °F-6.666666667 °C
25 °F-3.888888889 °C
30 °F-1.111111111 °C
35 °F1.666666667 °C
36.6 °F2.555555556 °C
37 °F2.777777778 °C
38 °F3.333333333 °C
40 °F4.444444444 °C
50 °F10 °C
60 °F15.55555556 °C
70 °F21.11111111 °C
80 °F26.66666667 °C
90 °F32.22222222 °C
100 °F37.77777778 °C
150 °F65.55555556 °C
180 °F82.22222222 °C
200 °F93.33333333 °C
250 °F121.1111111 °C

How to use: Fahrenheit to Celsius

  1. 1 Type the value in Fahrenheit.
  2. 2 The result in Celsius appears at once – or type in the Celsius field to convert back.
  3. 3 Pick a common value, round to fewer decimals or swap the units with one click.
  4. 4 Copy the result, or open “In every unit” to see the value in all units of temperature.

About this tool

Degree Fahrenheit (°F) is a temperature scale (imperial and US customary). Degree Celsius (°C) is a temperature scale (SI).

To convert Fahrenheit to Celsius, multiply by 0.5555555556, then add -17.77777778 (°C = °F × 0.5555555556 − 17.77777778). Example: 0 °F = -17.77777778 °C.

Calculated in your browser – nothing you type is sent anywhere.

Frequently asked questions

How do I convert Fahrenheit to Celsius?

To convert Fahrenheit to Celsius, multiply by 0.5555555556, then add -17.77777778: °C = °F × 0.5555555556 − 17.77777778. For example 0 °F = -17.77777778 °C.

What is 1 °F in Celsius?

1 °F = -17.22222222 °C. The other way round, 1 °C = 33.8 °F.

How exact is the result?

The converter uses the official definitions of both units and shows up to 10 significant digits; choose 0–6 decimals to round. Both units are defined exactly in terms of each other, so the factor itself is exact.

Can I convert other units of temperature here?

Yes – choose any of the 5 units of temperature in the From and To lists, or switch to another measurement at the top.

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