Temperature Converter (Celsius, Fahrenheit, Kelvin)

Temperature Converter handles four scales rather than the three in its title: Celsius, Fahrenheit, Kelvin and Rankine, in any direction.

Temperature is an offset scale, not a scaling, so there is no factor table behind this page. Each reading is first turned into Celsius by its own formula — (F minus 32) times 5/9, K minus 273.15, (R minus 491.67) times 5/9 — and then written out into the scale you asked for. Because a ratio between two offset scales would be meaningless, this is the one converter here that does not also print a "one unit equals" line beside the answer. There is also no physical floor: the arithmetic is unchecked, so an input of minus 400 Celsius is accepted and returns a negative Kelvin figure, which is not a temperature that can exist.

This page makes no network request of any kind — not for the conversion and not for a lookup, because those four formulas are the entire engine. The reading you type is gone the moment you leave.

Reading a foreign weather forecast, setting an oven from a recipe written in the other scale, converting a fever reading between Celsius and Fahrenheit, and turning a Kelvin value from a physics problem into something you can picture.

Also known as: convert temperature · celsius to fahrenheit · f to c · kelvin to celsius · absolute temperature value in kelvin · change temperature format