Nanometrology is a branch of metrology concerned with the science of measurement at the nanoscale level, including the quantitative determination of dimensions as well as other physical properties such as mechanical, magnetic, electrical, optical properties and combinations thereof, chemical and biological properties of nanomaterials, and nanoscale events. Nanometrology has only lately been identified as a key to the future of nanotechnology in general, and the development of the NP market in particular. Nanometrology is the science of measuring dimensions in nanomaterials and nanodevices. Nanometrology is essential for quality control in manufacturing and toxicity research. Nanometrology is frequently employed in scientific study and technology that requires accurate measurements. This approach has recently been utilised to measure distances of up to 100 nm, which is critical for studying surface texture. Nanometrology is a technique used in biological research to evaluate the interaction of two biomolecules. Nanometrology has a wide range of applications in science, including biological, medicinal, and environmental studies. The advancement of nanometrology is now a critical necessity for the transition of nanoscience into nanotechnology.