The outside surface area of a box will be given as 2 h W 2 h L 2 W L Where l Length. To calculate the volume of a rectangle. The formula for finding the volume of a rectangular prism is the following.
Volume height width depth.
The volume is calculated by multiplying together each dimension and then converting it into the selected volumetric units. It can also be called as the rectangular parallelepiped. Then simply multiply the 3 measurements together using the formula Volume Length Width Height. V 5 in.