What is the base unit of volume in the SI system?

The base unit of volume in the International System of Units (SI) is cubic meter, represented as m³. Volume measures the three-dimensional space occupied by an object. Since volume involves three dimensions (length, width, and height), it is calculated as the product of these three linear dimensions, which in SI units are measured in meters. Therefore, when you combine the meter unit in three dimensions, you arrive at cubic meters (m × m × m = m³).

The other units provided do not represent volume correctly. The meter (m) represents length, the square meter (m²) indicates area, which is a two-dimensional measurement, and the fourth power of meter (m⁴) goes beyond the three dimensions needed for measuring volume. Understanding these distinctions helps clarify why m³ is the correct and standard unit of volume in SI.