Temperature

Just how hot is -100 degrees Celsius?

Below freezing

-100 °C

-148 °Fdegrees Fahrenheit

173.15 Kkelvin

-100 degrees Celsius-100 °CTemperature · definition

Dry ice sublimation point-78.5 °CSublimation temperature at one atmosphere · 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

-100 degrees Celsius is 21.5 K cooler than Dry ice sublimation point.

Measurements, assumptions & sources +

Celsius and Fahrenheit have shifted zero points. Differences are useful; “twice as hot” in °C or °F is not a physical temperature ratio.

Solid carbon dioxide sublimates near 194.65 K (−78.5 °C) at one atmosphere rather than melting. Pressure changes the phase boundary.

The marked sublimation temperature at one atmosphere is calibrated. Unmeasured illustration details are representative.

Measurement details

The visual compares temperature with sublimation temperature at one atmosphere. The records below preserve each value’s basis and caveats.

-100 °C

Temperature · definition

Celsius and Fahrenheit have shifted zero points. Differences are useful; “twice as hot” in °C or °F is not a physical temperature ratio.

-78.5 °C

Sublimation temperature at one atmosphere · approximate

Solid carbon dioxide sublimates near 194.65 K (−78.5 °C) at one atmosphere rather than melting. Pressure changes the phase boundary.

Comparing: Temperature ↔ Sublimation temperature at one atmosphere
Relative size: Temperature comparisons use an absolute difference in kelvins rather than a multiplicative ratio.

The labelled spans and stored measurements determine the scale; unmeasured illustration details do not.

Dry ice sublimation point is labelled approximate; treat the displayed value as a comparison anchor rather than false precision.

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