Millimeters to Nanometers

Millimeter

A millimeter (mm) is a small metric unit of length equal to one-thousandth of a meter. It is ideal for precise measurements like product packaging, engineering drawings, and small household objects. Many rulers and calipers include millimeter markings to help measure with accuracy.

Since 10 millimeters = 1 centimeter, converting between nearby metric units is simple. When switching to imperial units—for example, 1 mm ≈ 0.03937 inches—a conversion tool offers quick and accurate results.

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.