What Is a Fahrenheit to Celsius Converter?
A Fahrenheit to Celsius Converter changes a temperature measured in degrees Fahrenheit (°F) into the equivalent temperature in degrees Celsius (°C).
Fahrenheit and Celsius use different zero points and degree intervals, so converting between them requires both subtraction and multiplication rather than a simple one-factor conversion.
Fahrenheit to Celsius Formula
°C = (°F − 32) × 5/9
First subtract 32 from the Fahrenheit temperature. Then multiply the result by 5/9, or divide it by 1.8.
°C = (°F − 32) ÷ 1.8
How to Convert Fahrenheit to Celsius
Enter Fahrenheit
Enter the Fahrenheit temperature that you want to convert.
Subtract 32
Subtract 32 from the Fahrenheit temperature.
Multiply by 5/9
Multiply the remaining value by 5/9 to get Celsius.
Fahrenheit to Celsius Conversion Example
Suppose you want to convert 68°F to Celsius.
Example: Convert 68°F to Celsius
Therefore, 68°F = 20°C.
Fahrenheit to Celsius Conversion Table
The table below shows common Fahrenheit temperatures and their Celsius equivalents.
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| -40°F | -40°C |
| -4°F | -20°C |
| 0°F | -17.78°C |
| 32°F | 0°C |
| 50°F | 10°C |
| 59°F | 15°C |
| 68°F | 20°C |
| 77°F | 25°C |
| 86°F | 30°C |
| 95°F | 35°C |
| 98.6°F | 37°C |
| 104°F | 40°C |
| 212°F | 100°C |
What Is 32°F in Celsius?
32°F equals exactly 0°C. This is the freezing point of pure water under standard reference conditions.
32°F = 0°C
This is the familiar freezing point reference for water.
212°F = 100°C
This is the familiar boiling point reference for water at standard atmospheric pressure.
How to Convert Celsius Back to Fahrenheit
To convert Celsius to Fahrenheit, multiply the Celsius temperature by 9/5 and then add 32.
°F = (°C × 9/5) + 32
For example, 20°C multiplied by 9/5 equals 36. Adding 32 gives 68°F.
Fahrenheit vs Celsius
Fahrenheit and Celsius are two temperature scales with different reference points and degree sizes.
Fahrenheit
Fahrenheit uses the symbol °F and is commonly used for everyday temperature reporting in the United States.
Celsius
Celsius uses the symbol °C and is widely used around the world for weather, science and everyday temperature measurements.
When Are Fahrenheit and Celsius the Same?
Fahrenheit and Celsius have the same numerical value at -40 degrees.
Fahrenheit and Celsius Meeting Point
This is the only temperature at which both scales show the same numerical value.
Where Is Fahrenheit to Celsius Conversion Useful?
- Weather forecasts and travel planning
- Cooking and oven temperatures
- Science and laboratory measurements
- HVAC and environmental temperature readings
- International product specifications
- School and educational calculations
- Comparing temperature data from different countries
Fahrenheit and Celsius are temperature scales, so their conversion is different from ordinary length or volume conversions. You must account for both the 32-degree offset and the different degree sizes.
Common Fahrenheit to Celsius Conversion Mistakes
- Forgetting to subtract 32 before multiplying by 5/9.
- Using 9/5 instead of 5/9 for Fahrenheit to Celsius.
- Adding 32 instead of subtracting it.
- Confusing the Fahrenheit-to-Celsius formula with the reverse formula.
- Rounding too early when performing a precise calculation.
Fahrenheit to Celsius Converter FAQs
Subtract 32 from the Fahrenheit temperature and multiply the result by 5/9.
32 degrees Fahrenheit equals exactly 0 degrees Celsius.
68 degrees Fahrenheit equals exactly 20 degrees Celsius.
100 degrees Fahrenheit is approximately 37.78 degrees Celsius.
Fahrenheit and Celsius have the same numerical temperature at -40 degrees: -40°F = -40°C.
Multiply Celsius by 9/5 and then add 32. The formula is °F = (°C × 9/5) + 32.