How to Convert Celsius to Fahrenheit: A Complete Guide

Whether you are following a recipe from another country, checking the weather before a trip, or working on a science project, knowing how to convert Celsius to Fahrenheit is a practical skill. Here is everything you need to know.

The Formula

The exact formula to convert Celsius (°C) to Fahrenheit (°F) is:

°F = (°C × 9/5) + 32

Or in simpler terms: multiply the Celsius value by 1.8, then add 32.

Quick Examples

• 0°C (freezing point of water): (0 × 9/5) + 32 = 32°F
• 20°C (room temperature): (20 × 9/5) + 32 = 68°F
• 100°C (boiling point of water): (100 × 9/5) + 32 = 212°F
• 37°C (human body temperature): (37 × 9/5) + 32 = 98.6°F

Common Temperature Reference Table

A Handy Trick for Approximate Conversion

Need a quick mental estimate? Double the Celsius value and add 30. It will not be exact, but it is close enough for everyday conversation. For example, 25°C → (25 × 2) + 30 = 80°F (exact is 77°F).

Use Our Free Temperature Converter

Skip the math and use our free temperature converter to switch between Celsius, Fahrenheit, and Kelvin instantly.