The volume of the Moon is approximately 2.1958 × 10¹⁰ cubic kilometers (5.26 × 10¹⁰ cubic miles).

Here's how it's calculated:

* Shape: The Moon is roughly a sphere.

* Radius: The average radius of the Moon is about 1,737.1 kilometers (1,079.6 miles).

* Volume formula for a sphere: V = (4/3)πr³

* Calculation: (4/3) * π * (1,737.1 km)³ ≈ 2.1958 × 10¹⁰ km³