0 kelvin
0 KTemperature · definition
Celsius and Fahrenheit have shifted zero points. Differences are useful; “twice as hot” in °C or °F is not a physical temperature ratio.
Temperature
Just how hot is 0 kelvin?
Deep cold
0 K
-273.15 °Cdegrees Celsius
-459.67 °Fdegrees Fahrenheit
01
0 kelvin0 KTemperature · definition
02
Absolute zero0 KTemperature · approximate
Celsius and Fahrenheit zero points are offsets. Compare temperature differences, not ratios in °C or °F. The kelvin axis starts at absolute zero.
A little perspective
0 kelvin and Absolute zero are at the same temperature.
Measurements, assumptions & sources +
0 kelvin
Celsius and Fahrenheit have shifted zero points. Differences are useful; “twice as hot” in °C or °F is not a physical temperature ratio.
Absolute zero
The zero of the thermodynamic kelvin scale. It is approached in experiments, not reached by ordinary finite cooling.
NIST — 2022 CODATA fundamental constants
The marked temperature is calibrated. Unmeasured illustration details are representative.
Measurement details
Why these numbers?
The visual compares temperature with temperature. The records below preserve each value’s basis and caveats.
Absolute zero
0 KTemperature · approximate
The zero of the thermodynamic kelvin scale. It is approached in experiments, not reached by ordinary finite cooling.
- Comparing
- Temperature ↔ Temperature
- Relative size
- Temperature comparisons use an absolute difference in kelvins rather than a multiplicative ratio.
How to read the visual
The labelled spans and stored measurements determine the scale; unmeasured illustration details do not.
- Absolute zero is labelled approximate; treat the displayed value as a comparison anchor rather than false precision.
Change your perspective
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