You use cubic units when you describe volume because a cube is measuring 1 unit on each edge and the edge has a volume of one cubic unit.
Describing the volume or capacity of spaces or containers.
You could use cubic yards or cubic meters.
cubic units
The answer depends on the scale but commonly used units are cubic centimetres, cubic metres, cubic kilometres.
You would use the cubic meter (m^3) to express the volume of a textbook in SI units.
There is no standard unit of spherical volume. One would use the same units for describing the volume of any body, i.e. cubic-feet, cubic-meters, cubic-whatever. When one measures a space or object's volume these are the units used with the "cubic" coming from measuring the three dimensions an object takes up in space; length, width and depth. All three measurements must be in the same units; 1ft x 1ft x 1ft = 1 cubic-foot. You'll need the following equation for spherical volume: V= 4/3 x pi x r3 where "r" is the radius of the sphere.
Cubic centimeters would be most appropriate for volume
The volume of a solid is measured in cubic units
You can use any measurement but only if your adding cubic to it
While many different units can be used to measure volume, the most common units for measuring volume are the cubic centimeter (cm3) = 1 milliliter (ml).
Liter is a specific unit; the question should be, "metric units for volume". Volume is measured in cubic meters; for larger volumes you might use square kilometers; for smaller volumes, such as those that occur in everyday situations, you would usually use cubic decimeters (= liters), cubic centimeters (= milliliters), or cubic millimeters.
volume in units of gallons, liters, cubic feet, cubic meters etc