Celsius to Fahrenheit: The Easy Way to Convert

The world is divided into two teams: Celsius and Fahrenheit. If you travel or cook, you'll eventually need to switch between them. Here is the exact formula and a quick mental trick.

The Exact Formula

To convert Celsius (°C) to Fahrenheit (°F):

$$ °F = (°C \times 1.8) + 32 $$

To convert Fahrenheit (°F) to Celsius (°C):

$$ °C = (°F - 32) \div 1.8 $$

The Mental Trick (Approximation)

If you don't have a calculator, use this simple method to get a close estimate:

Celsius to Fahrenheit

1. Double the Celsius number.
2. Add 30.

Example: 20°C

• Double it: 40
• Add 30: 70
• Actual Answer: 68°F (Close enough for weather!)

Fahrenheit to Celsius

1. Subtract 30.
2. Divide by 2.

Example: 80°F

• Subtract 30: 50
• Divide by 2: 25
• Actual Answer: 26.6°C

Need Precision? For cooking or science, approximations aren't enough. Use our Temperature Converter for exact results.