How to Convert Celsius to Fahrenheit: Formula + Chart

Celsius (°C) is used in most of the world; Fahrenheit (°F) is used in the US. Converting between them matters for weather, fever checks, and cooking.

Conversion Formulas

°C → °F: °F = (°C × 9/5) + 32

°F → °C: °C = (°F − 32) × 5/9

Example

Convert 30°C to Fahrenheit:

• °F = (30 × 9/5) + 32 = 54 + 32 = 86°F

And back: 86°F → (86 − 32) × 5/9 = 54 × 5/9 = 30°C

Key Points to Remember

• 0°C = 32°F (freezing point of water)
• 100°C = 212°F (boiling point of water)
• −40°C = −40°F (the only point where they match)
• 37°C ≈ 98.6°F (normal body temperature)

Quick Chart

°C	°F
0	32
10	50
20	68
25	77
30	86
37	98.6
40	104

Where It Applies

• Fevers and health tracking
• Weather forecasts abroad
• Baking with Fahrenheit recipes

Try the Celsius-Fahrenheit converter for instant results.