Pick a converter below. Each one runs instantly in your browser — nothing is uploaded or stored.
Different fields and regions use different measurement systems — recipes list oven temperatures in Fahrenheit while science labs use Celsius or Kelvin, and designers hand off colors as hex codes while CSS and canvas APIs often expect RGB. A converter removes the manual arithmetic (and the rounding mistakes that come with it) so you get an exact answer instantly.
Is my data stored anywhere?
No. Every converter on this page runs entirely in your browser with JavaScript — nothing you type is sent to a server or saved.
Which temperature scale should I use?
Celsius and Fahrenheit are common for everyday weather and cooking; Kelvin is the standard unit for scientific and engineering calculations.
Why do hex codes need converting to RGB?
Hex (e.g. #5151e5) and RGB (e.g. rgb(81, 81, 229)) describe the same color in different notations — design tools commonly use hex, while some code (like CSS rgba() for transparency) needs the RGB form.