Convert between 5 temperature units online, including Celsius, Fahrenheit, and Kelvin. Supports custom decimal precision and one-click copy.
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When you need to convert Celsius to Fahrenheit or understand the Kelvin scale in scientific literature, manual calculations can be tedious and prone to errors. This tool is designed to solve this exact problem, providing fast and accurate conversions between five common temperature units based on standard conversion formulas. Temperature is a physical quantity expressing hot and cold, and unit conversion is essentially a linear relationship based on the definitions of each scale (such as the freezing and boiling points of water). Simply input a value and select its unit, and the tool will instantly output the corresponding results in Celsius (℃), Fahrenheit (℉), Kelvin (K), Rankine (°R), and Réaumur (°Re).
Q: What is 100 degrees Celsius in Fahrenheit?
212 degrees Fahrenheit. This is the standard result calculated using the conversion formula: ℉ = ℃ × 9/5 + 32.
Q: What are the differences and things to note when converting between Kelvin (K) and Celsius (℃)?
Kelvin and Celsius have the same scale intervals (1K = 1℃), but their zero points are defined differently. Zero Kelvin (0 K) is absolute zero, while zero Celsius (0℃) is the freezing point of water. Therefore, converting from Celsius to Kelvin requires adding 273.15 (i.e., K = ℃ + 273.15). This tool has this logic built-in, so users do not need to manually calculate the offset.
Input values must be in a valid numerical format, supporting positive numbers, negative numbers, and decimals. Please note that the conversion relationships between different units are linear, but some units (like Réaumur) are rarely used today and are mostly found in historical documents. This tool performs pure front-end calculations; all data is processed locally in your browser, and no private data is uploaded. For batch conversion needs, you currently need to input values one by one.
When performing scientific calculations or reading international papers, Kelvin is the base unit of the International System of Units (SI) and is recommended for primary use. For daily cooking or weather forecasts, Celsius (used in most countries) and Fahrenheit (used in the US) are more common. A typical application example: when you see a US oven recipe calling for "350℉", you can use this tool to quickly find out that it corresponds to approximately "176.7℃" (with precision set to 1 decimal place). Remembering a few common reference points helps with quick verification: the boiling point of water (at standard atmospheric pressure) is 100℃, 212℉, and 373.15K; normal human body temperature is approximately 37℃, 98.6℉, and 310.15K.
