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Temperature Converter - Celsius, Fahrenheit, Kelvin
Free temperature converter between Celsius, Fahrenheit, and Kelvin. Instantly convert °C to °F, °F to °C, and Kelvin conversions.
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin
Result
Enter your values to see results
and click the "Calculate" button
Temperature Scale Conversion
Convert between the three main temperature scales: Celsius (metric, used worldwide), Fahrenheit (imperial, used in US), and Kelvin (scientific, absolute scale). Understanding temperature conversions is essential for cooking, weather, science, and international communication.
How to Use
- Enter the temperature value
- Select the source scale
- Select the target scale
- Click Convert
Conversion Formulas
°F = (°C × 9/5) + 32 | °C = (°F - 32) × 5/9
K = °C + 273.15 | Water freezes at 0°C = 32°F = 273.15K
Frequently Asked Questions
How do I convert Celsius to Fahrenheit?
Multiply by 9/5 (or 1.8) and add 32. Formula: °F = (°C × 1.8) + 32. Example: 20°C = (20 × 1.8) + 32 = 68°F.
How do I convert Fahrenheit to Celsius?
Subtract 32, then multiply by 5/9. Formula: °C = (°F - 32) × 5/9. Example: 68°F = (68 - 32) × 5/9 = 20°C.
What is Kelvin used for?
Kelvin is the SI unit for temperature used in science. It starts at absolute zero (-273.15°C), where molecular motion stops. There are no negative Kelvin values.
At what temperature are Celsius and Fahrenheit equal?
-40 degrees is the same in both scales: -40°C = -40°F. This is the only point where they're equal.
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