what temp is absolute zero

Absolute zero is the lowest possible temperature in the universe, where all molecular motion theoretically stops.

That's exactly 0 Kelvin (K) , or -273.15°C , or -459.67°F.

Why This Temperature?

Imagine heat as the frantic dance of atoms—faster wiggles mean hotter temps. Absolute zero hits when that dance freezes completely, based on the Kelvin scale's definition tying zero to zero thermal energy.

This limit comes from the ideal gas law: as temperature drops, gas volume shrinks to nothing at -273.15°C, marking the thermodynamic floor.

Real-World Context

We've never hit exact absolute zero—it's impossible per the third law of thermodynamics—but labs reach billionths of a Kelvin using laser cooling.

Back in 2015, Reddit's r/explainlikeimfive buzzed with why it's "so cold" compared to trillions-degree plasmas: heat floors at zero because negative temps defy physics.

Key Conversions

Scale| Absolute Zero Value
---|---
Kelvin (K)| 0 K15
Celsius (°C)| -273.15°C17
Fahrenheit (°F)| -459.67°F17

Fun fact: At absolute zero, entropy hits minimum in perfect crystals, unlocking wild states like superconductivity.

TL;DR: Absolute zero is 0 K (-273.15°C or -459.67°F), the cosmic chill where heat vanishes.

Information gathered from public forums or data available on the internet and portrayed here.