How do I convert Fahrenheit to Celsius?

To convert Fahrenheit (°F) to Celsius (°C), use the formula: °C = °F × 0.5555555556 − 17.77777778. For example, 1 °F equals -17.2222 °C.

How many °C are in one °F?

There are -17.2222 celsius in one fahrenheit (1 °F = -17.2222 °C).

What is the conversion formula for °F to °C?

The exact conversion formula is: °C = °F × 0.5555555556 − 17.77777778. This converter uses this formula to give you an accurate result for any value you enter.

Fahrenheit to Celsius Converter

This free temperature converter converts Fahrenheit (°F) to Celsius (°C) and back again. The conversion uses the formula °C = °F × 0.5555555556 − 17.77777778 — note the additive offset which makes temperature conversions non-proportional.

Type a value in either field — the result updates in real time. The reference table below shows common conversion values at a glance. All calculations run entirely in your browser with no data sent to any server.

Fahrenheit (°F)	Celsius (°C)
0 °F	-17.7778 °C
20 °F	-6.6667 °C
37 °F	2.7778 °C
100 °F	37.7778 °C