Planck Time

Planck time, abbreviated as \(t_p\), is a fundamental unit in the system of Planck units.  It is based on the speed of light, the energies needed to smash particles in the universe at a time equal to the Planck length and universal gravitational constant divided by the speed of light.  It is a useful unit in theoretical physics.

• \(\large{ t_p = 5.391, 247 \;x\;10^{-44}\;s }\)
  

 

Planck Time Formula
\(\large{ t_p = \sqrt{ \frac{ h\;G } { c^5 } } }\)
Symbol	English	Metric
\(\large{ t_p }\) = Planck time	\(\large{sec}\)	\(\large{s}\)
\(\large{ G }\) = gravitational constant	\(\large{\frac{lbf-ft^2}{lbm^2}}\)	\(\large{\frac{N - m^2}{kg^2}}\)
\(\large{ h }\) = Planck constant	\(\large{\frac{lbf-ft}{sec}}\)	\(\large{J-s}\)
\(\large{ c }\) = speed of light in vacuum	\(\large{\frac{ft}{sec}}\)	\(\large{\frac{m}{s}}\)