# How is Hubble's constant related to time?

[Hubble's costant] = ${T}^{- 1}$
The reciprocal of the Hubble constant ${H}_{0}$ expressed in km/sec/mega parsec is used ro approximate the age of our universe as 13.8 billion years. The dimension$\left[{H}_{0}\right] = {T}^{- 1}$.