Celsius to Fahrenheit: The Complete Conversion Guide

The Celsius to Fahrenheit Formula

Temperature conversion between Celsius and Fahrenheit is something nearly everyone needs at some point — whether you're cooking, traveling, reading a weather forecast, or following medical advice. The exact formula is:

°F = (°C × 9/5) + 32

To convert Fahrenheit back to Celsius: °C = (°F − 32) × 5/9

Key Reference Temperatures

• 0°C = 32°F — Water freezing point
• 20°C = 68°F — Comfortable room temperature
• 37°C = 98.6°F — Normal human body temperature
• 100°C = 212°F — Water boiling point (at sea level)

A Quick Mental Shortcut

Memorizing the formula is hard. Here's an easy two-step method: double the Celsius value, subtract 10%, then add 32. For 20°C: 20 × 2 = 40, minus 10% = 36, plus 32 = 68°F. It's a rough approximation but useful for everyday estimates.

Why Two Systems Exist

Celsius (also called Centigrade) was designed with scientific logic: 0° is the freezing point of water, 100° is the boiling point. It was proposed by Anders Celsius in 1742 and is used by most of the world. Fahrenheit was proposed by Daniel Gabriel Fahrenheit in 1724. The United States remains one of the few countries still using °F as its primary temperature scale.

Cooking Temperature Reference

• 150°C = 302°F (low oven)
• 180°C = 356°F (moderate oven)
• 200°C = 392°F (hot oven)
• 220°C = 428°F (very hot oven)

Skip the math entirely — use our free temperature converter to get instant results.