# What is Volume?

What is **Volume**? The measure of three-dimensional space covered by a closed surface is expressed as a scalar quantity called **volume**. For instant, the space occupied or hold by a substance (solid, liquid, gas, or plasma). The SI derived unit of volume is, the cubic metre, is frequently used to quantify volume numerically. The volume of a container is commonly understand to represent its capacity, or the amount of fluid (gas or liquid) that it can hold, rather than the amount of space it occupies.

Volumes are also ascribed to three-dimensional mathematical shapes. Arithmetic formulas can be used to measure the volumes of different simple shapes, such as regular, straight-edged, and circular shapes. If a formula for the shape’s border available, integral calculus can be used to compute the volume of difficult shapes. In three-dimensional space, one-dimensional figures (such as lines) and two-dimensional forms (such as squares) have zero volume.

Fluid displace can be used to calculate the volume of a solid (whether regular or irregular in shape). The volume of a gas can also be measured by using liquid displacement. The volume of two substances combined is frequently larger than the volume of one of the substances alone. However, sometimes one material dissolves in the other, resulting in a non-additive combined volume.