Temperature Converter
Instantly convert temperatures between Celsius, Fahrenheit, Kelvin, Rankine, Delisle, and Newton scales.
(Abs Zero)
(Freezing)
(Boiling)
Reference Points
Conversion History
Frequently Asked Questions
How do I convert Celsius to Fahrenheit?
To convert Celsius to Fahrenheit, multiply the Celsius temperature by 9/5 (or 1.8) and then add 32. Formula: (°C × 9/5) + 32 = °F. Alternatively, you can use our instant converter above by simply typing your Celsius value into the first box.
What is absolute zero?
Absolute zero is the lowest possible temperature where nothing could be colder and no heat energy remains in a substance. It is defined as 0 K on the Kelvin scale, which equals -273.15 °C or -459.67 °F.
What is the Kelvin scale?
The Kelvin scale is a thermodynamic temperature scale commonly used in physical sciences. Unlike Celsius or Fahrenheit, it does not use degrees. It starts at absolute zero (0 K), making it an absolute temperature scale. An increment of 1 K is exactly equal to an increment of 1 °C.
Why are there so many temperature scales?
Different temperature scales were developed historically for various purposes. Celsius is based on the freezing and boiling points of water. Fahrenheit was developed for meteorological and human comfort measurements. Kelvin is used in science for absolute temperature. Rankine, Delisle, and Newton are mostly historical or used in very specific engineering applications.
Is this tool free to use?
Yes, the ToolWise Temperature Converter is completely free to use. You can perform as many conversions as you need without any restrictions or required sign-ups.