Temperature Converter

Absolute zero (0 K or -273.15°C) is the theoretical lowest possible temperature where all molecular motion stops. It has never been reached experimentally.

Celsius and Fahrenheit are equal at -40 degrees. -40°C = -40°F. This is the only point where the two scales read the same.

The US continues to use Fahrenheit due to historical precedent and cultural familiarity. Most other countries adopted Celsius as part of metric system adoption.

Subtract 32 from the Fahrenheit value, then divide by 1.8. For a quick estimate: subtract 30 then divide by 2. For example, 100°F: (100-30)/2 = 35°C (actual: 37.8°C).

No, Kelvin is an absolute temperature scale starting at absolute zero. Zero Kelvin is the lowest possible temperature, so Kelvin values are always positive.