Fahrenheit to Celsius formula
To convert Fahrenheit to Celsius, subtract 32 from the Fahrenheit temperature and multiply the result by 5/9.
°C = (°F − 32) × 5/9
Example: (68°F − 32) × 5/9 = 36 × 5/9 = 20°C
Quick Fahrenheit to Celsius estimate
For a quick mental estimate, subtract 30 from the Fahrenheit temperature and divide by 2. For example, 70°F gives (70 − 30) ÷ 2 = 20°C. The exact conversion is 21.1°C, so this shortcut is useful for a rough estimate rather than an exact result.
For an exact conversion, use the formula above or enter the temperature in the calculator. To convert in the opposite direction, use our Celsius to Fahrenheit Converter.
About the Fahrenheit scale
The Fahrenheit scale was developed by Daniel Gabriel Fahrenheit in the early 18th century. On the modern Fahrenheit scale, water freezes at 32°F and boils at 212°F at standard atmospheric pressure, giving 180 degrees between these two reference points. Fahrenheit is used primarily for everyday temperatures in the United States, while Celsius is used more widely around the world.
About the Celsius scale
The Celsius scale was proposed by Swedish astronomer Anders Celsius in 1742. On the modern Celsius scale, water freezes at 0°C and boils at 100°C at standard atmospheric pressure. Celsius is the temperature scale most commonly used for everyday measurements and is widely used in science alongside the kelvin.
Fahrenheit to Celsius conversion chart
| Fahrenheit (°F) | Celsius (°C) |
|---|---|
| −40°F | −40°C |
| 0°F | −17.8°C |
| 10°F | −12.2°C |
| 20°F | −6.7°C |
| 30°F | −1.1°C |
| 32°F | 0°C |
| 40°F | 4.4°C |
| 50°F | 10°C |
| 60°F | 15.6°C |
| 68°F | 20°C |
| 70°F | 21.1°C |
| 75°F | 23.9°C |
| 80°F | 26.7°C |
| 90°F | 32.2°C |
| 100°F | 37.8°C |
| 110°F | 43.3°C |
| 120°F | 48.9°C |
| 200°F | 93.3°C |
| 250°F | 121.1°C |
| 300°F | 148.9°C |
| 350°F | 176.7°C |
| 400°F | 204.4°C |
| 450°F | 232.2°C |
| 500°F | 260°C |
Fahrenheit, Celsius, and Kelvin
Fahrenheit and Celsius are commonly used for everyday temperatures, while kelvin is the SI unit of thermodynamic temperature. To convert Fahrenheit directly to kelvin, use our Fahrenheit to Kelvin Converter. You can also convert between Kelvin and Celsius.
Frequently asked questions
What is the formula for Fahrenheit to Celsius?
Subtract 32 from the Fahrenheit temperature and multiply by 5/9. The formula is °C = (°F − 32) × 5/9.
What is 32°F in Celsius?
32°F is exactly 0°C, the freezing point of water at standard atmospheric pressure.
What is 70°F in Celsius?
70°F is approximately 21.1°C.
What is 100°F in Celsius?
100°F is approximately 37.8°C.
What is 98.6°F in Celsius?
98.6°F equals exactly 37°C, the clinical standard baseline for normal human body temperature.
How do I convert an oven temperature from 350°F to °C?
350°F translates to 176.67°C. Most European recipes and oven dials round this value to 175°C or 180°C for practical cooking.
How do I convert Celsius back to Fahrenheit?
Multiply °C by 1.8 and add 32, or use our dedicated Celsius to Fahrenheit Converter.