10 free temperature conversion tools. Convert between Celsius, Fahrenheit, Kelvin, Rankine, and Réaumur instantly.
Our temperature converter tools provide 10 different ways to convert between the five most common temperature scales: Celsius, Fahrenheit, Kelvin, Rankine, and Réaumur. Whether you're a student studying thermodynamics, a scientist working in a laboratory, or just someone who needs to convert a temperature for a recipe, these tools are designed to be simple, fast, and accurate.
Temperature conversion is a fundamental need in many fields. Celsius is used worldwide for everyday temperature measurements, while Fahrenheit is still commonly used in the United States. Kelvin is the standard for scientific work, Rankine is used in engineering, and Réaumur is still found in some European contexts. Our tools allow you to convert between any of these scales instantly.
All calculations process locally in your browser — no data is ever sent to our servers. Each tool focuses on a specific conversion pair, making it easy to get exactly what you need.
Convert °C to °F
Convert °F to °C
Convert °C to K
Convert K to °C
Convert °F to K
Convert K to °F
Convert °C to °R
Convert °R to °C
Convert °C to °Ré
Convert °Ré to °C