How do I convert Celsius to Fahrenheit?

To convert Celsius to Fahrenheit, use the formula: °F = (°C × 9/5) + 32. For example, 25°C = (25 × 9/5) + 32 = 77°F.

What is the formula for converting Fahrenheit to Celsius?

To convert Fahrenheit to Celsius, use the formula: °C = (°F - 32) × 5/9. For example, 77°F = (77 - 32) × 5/9 = 25°C.

How do I convert to Kelvin?

To convert Celsius to Kelvin: K = °C + 273.15. To convert Fahrenheit to Kelvin: K = (°F - 32) × 5/9 + 273.15.

Temperature Converter - Free Online Tool

Convert temperatures between Celsius, Fahrenheit, Kelvin, Rankine, and Réaumur instantly. Our free temperature converter provides accurate results with step-by-step calculations for all your temperature conversion needs.

Temperature Value: Enter the temperature value you want to convert

From Unit: Select the unit of the temperature you entered

Convert To: Select the unit you want to convert to

How to Use the Temperature Converter

Enter the temperature value you want to convert in the input field
Select the unit of the temperature you entered (From Unit)
Choose the unit you want to convert to (Convert To)
Click the "Convert Temperature" button to see the result
View the converted temperature with step-by-step calculation
Use the Reset button to clear all fields and start over

Our temperature converter supports real-time conversion and provides accurate results for all major temperature scales including Celsius, Fahrenheit, Kelvin, Rankine, and Réaumur.

Temperature Conversion Formulas

Celsius to Fahrenheit

°F = (°C × 9/5) + 32

Example: 25°C = (25 × 9/5) + 32 = 77°F

Fahrenheit to Celsius

°C = (°F - 32) × 5/9

Example: 77°F = (77 - 32) × 5/9 = 25°C

Celsius to Kelvin

K = °C + 273.15

Example: 25°C = 25 + 273.15 = 298.15K

Kelvin to Celsius

°C = K - 273.15

Example: 298.15K = 298.15 - 273.15 = 25°C

Celsius to Rankine

°R = (°C + 273.15) × 9/5

Example: 25°C = (25 + 273.15) × 9/5 = 536.67°R

Celsius to Réaumur

°Ré = °C × 4/5

Example: 25°C = 25 × 4/5 = 20°Ré

About This Temperature Converter

Our free online temperature converter is designed to provide accurate and instant temperature conversions between all major temperature scales. Whether you're a student, scientist, engineer, or just need to convert temperatures for everyday use, this tool offers:

Accurate Conversions: Precise calculations using standard temperature conversion formulas
Multiple Units: Support for Celsius, Fahrenheit, Kelvin, Rankine, and Réaumur
Step-by-Step Results: See exactly how the conversion is calculated
Mobile Friendly: Works perfectly on all devices and screen sizes
No Registration: Free to use without any sign-up required
Instant Results: Real-time conversion as you type

Use Cases and Applications

Scientific Applications

Laboratory experiments and research
Physics and chemistry calculations
Data analysis and reporting
Scientific paper writing

Engineering

HVAC system design
Material science applications
Thermal analysis
Process engineering

Everyday Use

Cooking and baking recipes
Weather temperature conversion
Travel planning
Health and medical applications

Education

Student homework and assignments
Teaching temperature concepts
Science fair projects
Academic research

Common Temperature Conversion Examples

Celsius (°C)	Fahrenheit (°F)	Kelvin (K)	Description
-273.15	-459.67	0	Absolute Zero
0	32	273.15	Water Freezing Point
20	68	293.15	Room Temperature
37	98.6	310.15	Human Body Temperature
100	212	373.15	Water Boiling Point

Frequently Asked Questions (FAQ)

What is the difference between Celsius and Fahrenheit?

Celsius and Fahrenheit are two different temperature scales. Celsius is based on the freezing point (0°C) and boiling point (100°C) of water, while Fahrenheit uses 32°F for freezing and 212°F for boiling. Celsius is used worldwide, while Fahrenheit is primarily used in the United States.

When should I use Kelvin?

Kelvin is the absolute temperature scale used in scientific applications. It starts at absolute zero (-273.15°C) and is commonly used in physics, chemistry, and engineering calculations where absolute temperature measurements are required.

What is Rankine temperature scale?

Rankine is an absolute temperature scale that uses Fahrenheit-sized degrees but starts at absolute zero (like Kelvin). It's primarily used in engineering applications in the United States, particularly in thermodynamics.

Is this temperature converter accurate?

Yes, our temperature converter uses precise mathematical formulas and provides accurate results. It's suitable for both educational and professional use, including scientific and engineering applications.

Can I use this tool on my mobile device?

Absolutely! Our temperature converter is fully responsive and works perfectly on smartphones, tablets, and desktop computers. The interface adapts to your screen size for optimal usability.

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