The volume formula is a mathematical statement that may be used to calculate how much space (vacuum) any three-dimensional object takes up. Let's take a closer look at the volume formulas for various 3-D shapes. The volume formula is used to determine how much space an object can hold in total cubic capacity. The volume of a three-dimensional shape is measured in units3 or cubic units. Examine the volume formulas chart below, which shows the volume formulas for several 3-D shapes.About Volume Formulas