Particle size analysis (granulometry) is a discipline concerned with the description and measurement of the particle sizes of a material. It is used in many fields such as geology, chemistry, pharmaceuticals, food processing, and mineral processing to characterize the physical, mechanical, and chemical properties of materials.

Sieving is the most common technique used to determine the particle size distribution of a sample.

Particle size distribution describes how the particles of a material are distributed by size. Granulometry can be used to determine particle sizes within a specific size range, such as fine or coarse fractions, or to determine the complete particle size distribution of a sample, including the full range of particle sizes.

The results of particle size analysis can be used to characterize the mechanical, physical, and chemical properties of materials, such as rheology, permeability, strength, stability, solubility, bioactivity, and many other properties. For example, particle size analysis can be used for product quality control, for selecting raw materials for production, for monitoring and controlling manufacturing processes, and for product formulation.