Length Unit Converter

Convert lengths between different units like meters, feet, kilometers, and astronomical distances.

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Length Unit Information

Metric Units

Meter (m) - The base unit of length in the International System of Units (SI). Defined as the distance light travels in 1/299,792,458 of a second.

Centimeter (cm) - 1/100th of a meter. Commonly used for measuring smaller distances.

Millimeter (mm) - 1/1000th of a meter. Used for precise measurements.

Micrometer (μm) - 1/1000th of a millimeter. Also known as a micron.

Nanometer (nm) - 1/1,000,000th of a meter. Used in microscopy and nanotechnology.

Imperial Units

Inch (in) - Defined as exactly 2.54 centimeters. Used primarily in the United States.

Foot (ft) - 12 inches. Commonly used for measuring height and distance.

Yard (yd) - 3 feet. Used in sports and fabric measurements.

Astronomical Units

Astronomical Unit (AU) - The average distance between Earth and the Sun, about 150 million kilometers.

Light-year (ly) - The distance light travels in one year, about 9.46 trillion kilometers.

Parsec (pc) - About 3.26 light-years. Used in astronomy to measure vast distances.

Kiloparsec (kpc) - 1,000 parsecs. Used for measuring distances between galaxies.