# Bohr radius conversions

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

## About Bohr radius

The **Bohr radius** is a unit of length in atomic units. The Bohr radius 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 5.3 × 10^{-11} meters (a_{0} ≈ 5.3 × 10^{-11} m), the base unit of length in the International System of Units (SI).

The Bohr radius (a_{0}) is also equal to approximately 0.53 angstroms (Å) (a non-SI unit of length), or 5.3 × 10^{-5} micrometers (μm), or 5.3 × 10^{-8} millimeters (mm) or 5.3 × 10^{-9} centimeters (cm), which are SI units of length.

The Bohr radius is used in atomic physics calculations.

Symbol: a_{0}

Plural: Bohr radii

Bohr radius conversions: a list with conversions from Bohr radius to other (metric, imperial, or customary) length and distance measurement units is displayed 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)