# Gravitational constant facts for kids

The **gravitational constant**, called **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 Newton's universal law of gravitation.

**G** is about 6.6738 x10-11N⋅m^{2}/kg^{2}, and is denoted by letter *G*.

It usually appears in Sir Isaac Newton's law of universal gravitation, and in Albert Einstein's general theory of relativity. It is also known as the **universal gravitational constant**, **Newton's constant**, and colloquially as **Big G**. It should not be confused with "small g" (*g*), which is the local gravitational field of the Earth (equivalent to the free-fall acceleration).

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Gravitational constant Facts for Kids. *Kiddle Encyclopedia.*