Temperature Conversion
Convert temperature units
Features
Supports five temperature units
Covers Celsius, Fahrenheit, Kelvin, Rankine, and Réaumur
Convert all at once as you type
Automatically convert to every unit in real time as you enter a value
One-click copy of results
Copy each conversion result individually with the button on each row
Freely choose the base unit
Switch which unit serves as the basis for the input value
How to use
Enter the value to convert
Enter the temperature value you want to convert in the value field
Choose the base unit
Choose the temperature unit of the input value from the base unit menu
Check the conversion results
The table on the right instantly shows the converted values for all other units
Use cases
Convert temperatures in overseas recipes
Convert oven temperatures given in Fahrenheit to Celsius for cooking
Check overseas weather forecasts
Convert temperatures shown in Fahrenheit to Celsius to grasp how it feels
Study science and physics
Check the relationship between Kelvin and Celsius to aid understanding of thermodynamics
Unify units of experiment data
Align temperatures recorded in different units to a single basis
Basic Knowledge
Conversion Formula between Celsius and Fahrenheit
The conversion formula from Celsius to Fahrenheit is "°F = °C × 1.8 + 32". Water's freezing point is 0°C = 32°F, and its boiling point is 100°C = 212°F. Body temperature of 37°C is approximately 98.6°F.
What is Kelvin (K)
Kelvin is the SI base unit of temperature with absolute zero (−273.15°C) as 0, and the scale intervals are the same as Celsius. 0°C equals 273.15K, and Kelvin is used more than Celsius in scientific calculations.
Safety and privacy
Runs entirely in your browser
Your input data is processed only within your browser and is never sent externally.
Processing only in your browser
temperature conversion is processed entirely within your browser, and input data is not sent to any server.
Communications encrypted with HTTPS
Page loading is also encrypted by TLS, and content cannot be read by third parties.
No transmission to third parties
Input content is not sent to external services such as ad networks or trackers.
No automatic saving of results
the input values and conversion results and input suggestions are not stored on the server.
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Can be used for commercial purposes such as research, calculation, processing, and conversion in business and production.
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Usage guidelinesYou are free to use it for normal purposes. However, use for purposes that violate laws, infringe on third-party rights, impose significant load on the service, or otherwise interfere with service operation is prohibited.
We do not guarantee the accuracy or completeness of information and calculation results obtained from each tool.
This notice is a translation of the original Japanese text. If there is any discrepancy between the translation and the original, the Japanese original takes precedence.