How to convert Fahrenheit to Celsius
Fahrenheit and Celsius are related by a formula rather than a single factor. Temperature conversions are needed for weather, cooking, science and travel. Temperature scales have different zero points, so conversions use offsets as well as ratios.
Fahrenheit to Celsius conversion table
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| -40 °F | -40 °C |
| -20 °F | -28.8888888889 °C |
| -10 °F | -23.3333333333 °C |
| 0 °F | -17.7777777778 °C |
| 10 °F | -12.2222222222 °C |
| 20 °F | -6.66666666667 °C |
| 25 °F | -3.88888888889 °C |
| 30 °F | -1.11111111111 °C |
| 37 °F | 2.77777777778 °C |
| 40 °F | 4.44444444444 °C |
| 50 °F | 10 °C |
| 100 °F | 37.7777777778 °C |
About the units
Fahrenheit (°F)
Fahrenheit sets water freezing at 32 °F and boiling at 212 °F; it is used in the US.
Celsius (°C)
Celsius sets water freezing at 0 °C and boiling at 100 °C at sea level.
How to use this converter
- Type the number of Fahrenheit (°F) in the input box.
- The result in Celsius appears instantly — no button needed.
- See the same value in every other temperature unit just below.
- Use “Swap units” to convert Celsius back to Fahrenheit.
Tips for better results
- Double-check which system a unit belongs to (for example US vs UK gallons).
- Use the swap button to convert in the opposite direction instantly.
- Bookmark the conversions you use most — each pair has its own page.
Frequently asked questions
How many Celsius are in one fahrenheit?
-17.2222222222 °C corresponds to 1 °F. Because this scale uses an offset or an inverse relationship, there is no single multiplication factor — use the formula above.
How do I convert Fahrenheit to Celsius?
Apply the formula shown on this page, or enter your value in the converter for an instant exact answer.
What is 37 °F in °C?
37 °F = 2.77777777778 °C. Also, 0 °F = -17.7777777778 °C and 100 °F = 37.7777777778 °C.
What is the difference between a fahrenheit and a celsius?
Fahrenheit sets water freezing at 32 °F and boiling at 212 °F; it is used in the US. Celsius sets water freezing at 0 °C and boiling at 100 °C at sea level.
Is this tool free and private?
Yes — the Fahrenheit to Celsius is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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