A rectangle is a two-dimensional shape and therefore does not have a volume. It has an area. If you are referring to the volume of a rectangular prism (also known as a cuboid), the formula is: $$V = \text{length} \times \text{width} \times \text{height}$$ Where: $V$ is the volume $\text{length}$ is the measure of the longest side of the base $\text{width}$ is the measure of the shorter side of the base $\text{height}$ is the measure of how tall the prism is So, the formula for the volume of a rectangular prism is $\boxed{V = LWH}$.