# Gravitational constant

The gravitational constant, called ${\displaystyle G}$ in physics equations, is an empirical physical constant. It is used to show the force between two objects caused by gravity. The gravitational constant appears in Isaac Newton's universal law of gravitation.
${\displaystyle G}$ is about 6.67430×10−11 N⋅m2/kg2,[1] and is denoted by letter ${\displaystyle G}$.
1. "2018 CODATA Value: Newtonian constant of gravitation". The NIST Reference on Constants, Units, and Uncertainty. NIST. 20 May 2019. Retrieved 2019-05-20. Cite has empty unknown parameter: `|month=` (help)