Converting Fahrenheit to Celsius is needed constantly — checking a weather forecast, an oven temperature, or a body temperature reading against the scale used almost everywhere outside the US. This page covers exactly how to convert Fahrenheit to Celsius using the exact formula, a full conversion chart, and worked examples across commonly searched values. The reverse conversion is at Celsius to Fahrenheit. For Kelvin as well, use the temperature converter. Browse all converters if you need a different tool.
How to Convert Fahrenheit to Celsius
The Fahrenheit to Celsius Formula
°C = (°F − 32) × 5/9
To convert Fahrenheit to Celsius, subtract 32 from the Fahrenheit value first, then multiply the result by 5/9 (or equivalently, divide by 1.8). Subtracting 32 aligns the Fahrenheit and Celsius scales' different zero points, and the 5/9 factor scales Fahrenheit's smaller degree increments back to Celsius's larger ones.
Fahrenheit to Celsius Conversion Chart
Reference Table: 36°F to 110°F
| Fahrenheit | Celsius |
|---|---|
| 36°F | 2.2°C |
| 38°F | 3.3°C |
| 41°F | 5.0°C |
| 48°F | 8.9°C |
| 50°F | 10.0°C |
| 55°F | 12.8°C |
| 60°F | 15.6°C |
| 66°F | 18.9°C |
| 67°F | 19.4°C |
| 68°F | 20.0°C |
| 69°F | 20.6°C |
| 70°F | 21.1°C |
| 71°F | 21.7°C |
| 74°F | 23.3°C |
| 75°F | 23.9°C |
| 76°F | 24.4°C |
| 77°F | 25.0°C |
| 80°F | 26.7°C |
| 85°F | 29.4°C |
| 90°F | 32.2°C |
| 95°F | 35.0°C |
| 98°F | 36.7°C |
| 100°F | 37.8°C |
| 110°F | 43.3°C |
Worked Examples: Common F to C Conversions
Example: 90 degrees Fahrenheit to Celsius
(90 − 32) × 5/9 = 58 × 5/9 ≈ 32.2°C
Example: 68°F to Celsius
(68 − 32) × 5/9 = 36 × 5/9 = 20.0°C — commonly cited as standard "room temperature."
Frequently Asked Questions
How do I convert Fahrenheit to Celsius?
Subtract 32 from the Fahrenheit value, then multiply by 5/9. For example, 90 degrees Fahrenheit converts to approximately 32.2 degrees Celsius.
What is 90 degrees Fahrenheit in Celsius?
90 degrees Fahrenheit equals approximately 32.2 degrees Celsius.
What is 100°F in Celsius?
100 degrees Fahrenheit equals approximately 37.8 degrees Celsius, close to normal human body temperature.
What is 68°F in Celsius?
68 degrees Fahrenheit equals exactly 20.0 degrees Celsius, often cited as standard room temperature.
What's the Fahrenheit to Celsius formula?
Celsius equals (Fahrenheit minus 32) multiplied by 5/9.
Is this the same as converting Celsius to Fahrenheit?
No, this is the reverse direction. For converting Celsius to Fahrenheit instead, the Celsius to Fahrenheit converter is built for that specifically.
Is this Fahrenheit to Celsius converter free to use?
Yes. It is free, requires no sign-up, and converts instantly.