🌡️ Temperature Converter

Celsius to Fahrenheit
( °C → °F )

Instantly convert Celsius to Fahrenheit. Enter any value below and get an accurate result with the full formula and reference table.

Converter Tool
°C
°F
Result
0°C = 32°F
32
°F
The Formula
°F = °C × 9/5 + 32
Multiply Celsius by 9/5, then add 32.

How to Convert Celsius to Fahrenheit

To convert Celsius to Fahrenheit, multiply the Celsius temperature by 9/5 (or 1.8) and then add 32. This is the standard formula for temperature conversion between these two scales.

Step-by-Step Example

Let’s convert 25°C to Fahrenheit:

1. Multiply by 9/5: 25 × 9/5 = 45
2. Add 32: 45 + 32 = 77
3. So 25°C equals 77°F.

Another common example: 100°C (boiling point of water) → 100 × 9/5 + 32 = 212°F.

When You’d Use Each Unit

Celsius is used in most countries for everyday temperature measurements, as well as in science. Fahrenheit is primarily used in the United States for weather, cooking, and body temperature. Converting between them is essential for travel, science, and international communication.

Conversion Table

Common Celsius values converted to Fahrenheit — typical values highlighted.

Celsius (°C) Fahrenheit (°F) Approximate
Frequently Asked Questions
How do I convert Celsius to Fahrenheit quickly? +
Double the Celsius value, subtract 10%, then add 32 for a rough estimate. Exact formula: °F = °C × 9/5 + 32.
What is 0°C in Fahrenheit? +
0°C = 32°F.
What is 20°C in Fahrenheit? +
20°C = 68°F.
What is 100°C in Fahrenheit? +
100°C = 212°F.
What is the absolute zero in Fahrenheit? +
Absolute zero (0 K) is -273.15°C = -459.67°F.
Can I convert Fahrenheit back to Celsius with this tool? +
Yes! Just type a value into the Fahrenheit field and the Celsius field updates automatically. Or use the ⇄ swap button to switch directions.
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