Fahrenheit to Celsius Converter
Convert a temperature from Fahrenheit to Celsius for weather, cooking, thermostats, or everyday temperature checks. Enter any Fahrenheit value, including temperatures below zero, to see the Celsius equivalent. For example, -4 °F = -20 °C.
Convert °F to °C
Enter one number, such as 72, 98.6 or -4. Use a decimal point, not a comma.
Celsius (°C)
(68 - 32) x 5/9 = 20 °C
Automatic keeps up to 6 decimal places. The ≈ sign means rounded; very small or large results use scientific notation.
What does the converted temperature mean?
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72 °F on a forecast
About 22.2 °C - For quick comparison, 50 °F = 10 °C, 68 °F = 20 °C, and 86 °F = 30 °C. The converter changes the temperature unit only. It does not calculate a forecast's “feels like” temperature, which may also depend on factors such as wind and humidity.
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350 °F in a recipe
About 176.7 °C - This is the direct temperature conversion, not an adjustment for a fan or convection oven. If your oven uses 5 °C steps, 175 °C is the closest setting. Check whether the recipe is written for a conventional or fan-assisted oven, and follow your appliance guidance when needed.
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98.6 °F on a thermometer
Exactly 37 °C - The conversion changes only the unit. It does not change the accuracy or meaning of the original thermometer reading. For example, 100.4 °F = 38 °C, but this calculator does not interpret symptoms or determine whether a temperature is medically concerning. Keep the original reading and measurement method when sharing the result with a healthcare professional.
Fahrenheit to Celsius conversion table
Use the table below for quick Fahrenheit-to-Celsius comparisons. Values marked with ≈ are rounded to one decimal place, while values without the symbol are exact.
Open the copyable text table
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| -40 | -40 |
| -4 | -20 |
| 0 | ≈ -17.8 |
| 32 | 0 |
| 68 | 20 |
| 72 | ≈ 22.2 |
| 98.6 | 37 |
| 100.4 | 38 |
| 212 | 100 |
| 350 | ≈ 176.7 |
How to convert Fahrenheit to Celsius
To convert Fahrenheit to Celsius, subtract 32 from the Fahrenheit value, then multiply the result by 5/9. °C = (°F - 32) x 5/9. For example, to convert 68 °F: (68 - 32) x 5/9 = 20 °C The same formula works for temperatures below zero. At -40°, Fahrenheit and Celsius have the same value: -40 °F = -40 °C
Converting a temperature change
A temperature difference is converted differently from an actual temperature reading. For example, an increase of 18 °F is equal to an increase of 10 °C. For a temperature change, multiply by 5/9 without subtracting 32. The calculator above is designed for temperature readings, not for increases or decreases.
Temperatures below absolute zero are not physically possible, so the calculator does not accept values below -459.67 °F, which equals -273.15 °C. Extra decimal places show the conversion in more detail, but they do not make the original thermometer reading more accurate.