Micrometer
A micrometer (µm) is a metric unit of length equal to one-millionth of a meter. It is commonly used in science, engineering, and manufacturing to measure microscopic dimensions. For reference, a human hair is typically between 50 and 100 micrometers thick.
Micrometers help describe the size of bacteria, material thickness, and tiny machine components. When comparing such small values with larger units, a conversion tool can make precise measurements much easier to work with.
Nanometer
A nanometer (nm) is a microscopic metric unit equal to one-billionth of a meter. It is used in science and technology to measure atoms, wavelengths of light, and semiconductor components. Nanometers help describe the invisible structures that make modern electronics work.
Because nanometers are so tiny, converting to micrometers or meters helps give context to scientific data—especially in materials research and optics.