Temperature Conversion: Convert between Celsius, Kelvin, and Fahrenheit

Clickable Temperature Thermometer

Online Temperature Converter °F (degrees Fahrenheit) °C (degrees Celsius or Centigrade) K (Kelvins) Always display scientific notation.

Temperature Conversion Instructions

Enter a value for any one of the three temperature scales and the others will automatically be calculated. Javascript must be enabled in your web browser for calculations to occur.

Significant figures are used. Results are shown only with as many significant figures as the quantity that was entered. Scientific notation may be used for large results or if the number of significant digits would be ambiguous otherwise. The calculator follows proper rounding rules for scientific purposes.

The formulas used to convert between temperatures are as follows:

• °C = (°F - 32) * 5 / 9
• °F = (°C * 1.8) + 32
• K = °C + 273.15
• °C = K - 273.15

Temperature Converter License

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

About Temperature Conversion

The fahrenheit was proposed by Daniel Gabriel Fahrenheit. The scale is often mispelled as "farhenheit", "farenheit", "farhenhiet", or "farenhiet".

The Celcius scale is still sometimes called the "centigrade" scale because it is divided into 100 divisions. It was devised by Andres Celsius.