# Plank length conversions

The Plank length conversion selector on this page selects the length/distance measurement unit to convert to starting from Plank lengths. To make a conversion starting from a unit of length other than Plank length, simply click on the "Reset" button.

## About Plank length

The **Plank length** is the base unit of length in the system of Plank units equal to 1.6162 × 10^{-35} meters (1 Plank length = 1.616252 × 10^{-35} m), the base unit of length in the International System of Units (SI).

The Plank length is also equal to 1.616252 × 10^{-25} angstroms (Å) (a non-SI unit of length), or 1.616252 × 10^{-26} nanometers (nm), or 1.616252 × 10^{-29} micrometers (μm) or 1.616252 × 10^{-32} millimeters (mm), which are SI units of length.

The Planck units (or natural units) are units of measurement defined exclusively in terms of the following five universal physics constants: Gravitational constant (G), reduced Planck constant (h), Speed of light in a vacuum (c), Coulomb constant (ke or k), and Boltzmann constant (kB). In the Plank units, all these constants are normalized to 1. Thus, unlike the other measurement units, the Plank units are not based on the properties of any prototype object or particle but only on the properties of free space.

The Plank units are used in quantum physics.

Plural: Plank lengths

Plank length conversions: a list with conversions from Plank lengths to other (metric, imperial, or customary) length and distance measurement units is given below.

- Plank length to angstrom
- Plank length to astronomical unit
- Plank length to Bohr radius
- Plank length to cable (International)
- Plank length to cable (UK)
- Plank length to cable (US)
- Plank length to centimeter
- Plank length to chain
- Plank length to cubit
- Plank length to decameter
- Plank length to decimeter
- Plank length to Earth radius
- Plank length to Earth-Moon distance
- Plank length to Earth-Sun distance
- Plank length to fathom
- Plank length to femtometer
- Plank length to fermi
- Plank length to foot
- Plank length to furlong
- Plank length to hectometer
- Plank length to inch
- Plank length to kilometer
- Plank length to league
- Plank length to light-day
- Plank length to light-hour
- Plank length to light-minute
- Plank length to light-second
- Plank length to light-year
- Plank length to meter
- Plank length to micrometer
- Plank length to micron
- Plank length to mil
- Plank length to mile
- Plank length to millimeter
- Plank length to nanometer
- Plank length to nautical league
- Plank length to nautical mile
- Plank length to parsec
- Plank length to picometer
- Plank length to quarter
- Plank length to rod
- Plank length to yard