Temperature Converter
Convert temperatures instantly between Celsius, Fahrenheit, and Kelvin. Perfect for cooking, weather forecasting, science experiments, and international travel. Fast, accurate, and completely free.
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How to Use This Tool
Step 1: Enter Value
Type the temperature value you want to convert.
Step 2: Select Unit
Choose the original temperature unit (C, F, or K).
Step 3: See Results
All conversions appear instantly and automatically.
Frequently Asked Questions
Celsius (°C) is used worldwide, with 0°C as the freezing point and 100°C as the boiling point of water. Fahrenheit (°F) is mainly used in the US, with 32°F as freezing and 212°F as boiling. Kelvin (K) is the scientific scale that starts at absolute zero (0K = -273.15°C) and has no negative values.
Use the formula: °F = (°C × 9/5) + 32. For example, 20°C = (20 × 9/5) + 32 = 68°F. To convert back: °C = (°F - 32) × 5/9.
Absolute zero is 0 Kelvin (−273.15°C or −459.67°F), the theoretical lowest possible temperature where all molecular motion stops. It’s the starting point of the Kelvin scale.
Kelvin is preferred in scientific calculations because it starts at absolute zero and avoids negative values, which simplifies equations in physics, chemistry, and thermodynamics.
The United States, Belize and a few Caribbean nations still use Fahrenheit for everyday temperature readings. Most of the world uses Celsius as the standard scale.