# Bohr radius conversions

length conversions » Bohr radius conversionsThe Bohr radius conversion selector above selects the length/distance measurement unit to convert to starting from Bohr radii (a0). To make a conversion starting from a unit of length other than Bohr radius, simply click on the "Reset" button.

## What is Bohr radius?

The **Bohr radius** is a unit of length in atomic units. It expresses the most likely position of the electron in a hydrogen atom, the simplest atom, in its ground state (the Bohr model of an atom). The Bohr radius unit is named after the Danish physicist Niels Henrik David Bohr (1885 - 1962), who made fundamental contributions to understanding the atomic structure and quantum mechanics.

The Bohr radius of hydrogen has a value of approximately 5.3x10-11 meters (a0 ≈ 5.3x10-11 m), the base unit of length in the International System of Units (SI). It is also equal to approximately 0.53 angstroms (Å) (a non-SI unit of length), or 5.3x10-5 micrometers (μm), or 5.3x10-8 millimeters (mm) or 5.3x10-9 centimeters (cm), which are SI units of length.

The Bohr radius is used in atomic physics calculations.

*Symbol:*

a0

*Plural:*

Bohr radii

## Bohr radius conversions: links

A compehensive list with conversions from Bohr radii to other (metric, imperial, or customary) length and distance measurement units is presented below.

- Bohr radius to angstrom (a0 to Å)
- Bohr radius to astronomical unit (a0 to AU)
- Bohr radius to cable (International)
- Bohr radius to cable (UK)
- Bohr radius to cable (US)
- Bohr radius to centimeter (a0 to cm)
- Bohr radius to chain (a0 to ch)
- Bohr radius to cubit
- Bohr radius to decameter (a0 to dam)
- Bohr radius to decimeter (a0 to dm)
- Bohr radius to Earth radius (a0 to RE)
- Bohr radius to Earth-Moon distance
- Bohr radius to Earth-Sun distance
- Bohr radius to fathom (a0 to ftm)
- Bohr radius to femtometer (a0 to fm)
- Bohr radius to fermi (a0 to fm)
- Bohr radius to foot (a0 to ft)
- Bohr radius to furlong (a0 to fur)
- Bohr radius to hectometer (a0 to hm)
- Bohr radius to inch (a0 to in)
- Bohr radius to kilometer (a0 to km)
- Bohr radius to league (a0 to lea)
- Bohr radius to light-day
- Bohr radius to light-hour
- Bohr radius to light-minute
- Bohr radius to light-second
- Bohr radius to light-year (a0 to ly)
- Bohr radius to meter (a0 to m)
- Bohr radius to micrometer (a0 to μm)
- Bohr radius to micron (a0 to μ)
- Bohr radius to mil
- Bohr radius to mile (a0 to mi)
- Bohr radius to millimeter (a0 to mm)
- Bohr radius to nanometer (a0 to nm)
- Bohr radius to nautical league
- Bohr radius to nautical mile (a0 to nmi)
- Bohr radius to parsec (a0 to pc)
- Bohr radius to picometer (a0 to pm)
- Bohr radius to Plank length
- Bohr radius to quarter
- Bohr radius to rod (a0 to rd)
- Bohr radius to yard (a0 to yd)