Planck density - Definition and Overview

The Planck density is the natural unit of density, denoted by ρ_P.

ρ_P = Planck mass / (Planck length)³ = <math> c^5 /(\hbar G^2 )<math> ≈ 5.1 × 10⁹⁶ kg/m³

where:

c is the speed of light in a vacuum

<math>\hbar<math> is Dirac's constant

G is the gravitational constant

See also

• Natural units
• Planck length
• Planck mass
• Planck time