A.u. of Length Conversions

The atomic unit of length is the Bohr radius, about 5.29 × 10⁻¹¹ m: the most probable distance between the proton and electron in a hydrogen atom.

From

To

1 a₀ = 5.291772109 × 10⁻¹¹ m

Convert atomic units of length to other units

Each line shows how much 1 a.u. of length (a₀) equals. Select a conversion for a calculator, formula and table.

Metric (SI)

A.u. of Length to Meter5.29177 × 10⁻¹¹ m
A.u. of Length to Kilometer5.29177 × 10⁻¹⁴ km
A.u. of Length to Hectometer5.29177 × 10⁻¹³ hm
A.u. of Length to Dekameter5.29177 × 10⁻¹² dam
A.u. of Length to Decimeter5.29177 × 10⁻¹⁰ dm
A.u. of Length to Centimeter5.29177 × 10⁻⁹ cm
A.u. of Length to Millimeter5.29177 × 10⁻⁸ mm
A.u. of Length to Micrometer0.0000529177 µm
A.u. of Length to Micron0.0000529177 µ
A.u. of Length to Nanometer0.0529177 nm
A.u. of Length to Angstrom0.529177 Å
A.u. of Length to Picometer52.9177 pm
A.u. of Length to Femtometer52,917.7 fm
A.u. of Length to Fermi52,917.7 fm
A.u. of Length to Attometer52,917,700 am
A.u. of Length to Megameter5.29177 × 10⁻¹⁷ Mm
A.u. of Length to Gigameter5.29177 × 10⁻²⁰ Gm
A.u. of Length to Terameter5.29177 × 10⁻²³ Tm
A.u. of Length to Petameter5.29177 × 10⁻²⁶ Pm
A.u. of Length to Exameter5.29177 × 10⁻²⁹ Em

Imperial & US customary

A.u. of Length to Inch2.08337 × 10⁻⁹ in
A.u. of Length to Foot1.73615 × 10⁻¹⁰ ft
A.u. of Length to Yard5.78715 × 10⁻¹¹ yd
A.u. of Length to Mile3.28815 × 10⁻¹⁴ mi
A.u. of Length to Kiloyard5.78715 × 10⁻¹⁴ kyd
A.u. of Length to Furlong2.63052 × 10⁻¹³ fur
A.u. of Length to Chain2.63052 × 10⁻¹² ch
A.u. of Length to Rope8.68073 × 10⁻¹² rope
A.u. of Length to Rod1.05221 × 10⁻¹¹ rd
A.u. of Length to Perch1.05221 × 10⁻¹¹ perch
A.u. of Length to Pole1.05221 × 10⁻¹¹ pole
A.u. of Length to Fathom2.89358 × 10⁻¹¹ ftm
A.u. of Length to Link2.63052 × 10⁻¹⁰ li
A.u. of Length to Hand5.20844 × 10⁻¹⁰ h
A.u. of Length to Mil0.00000208337 mil
A.u. of Length to Microinch0.00208337 µin

US survey units

A.u. of Length to Foot (US Survey)1.73614 × 10⁻¹⁰ ft (US)
A.u. of Length to Inch (US Survey)2.08337 × 10⁻⁹ in (US)
A.u. of Length to Mile (US Survey)3.28815 × 10⁻¹⁴ mi (US)
A.u. of Length to Mile (Statute)3.28815 × 10⁻¹⁴ mi
A.u. of Length to League (Statute)1.09605 × 10⁻¹⁴ lea
A.u. of Length to Furlong (US Survey)2.63052 × 10⁻¹³ fur (US)
A.u. of Length to Chain (US Survey)2.63052 × 10⁻¹² ch (US)
A.u. of Length to Rod (US Survey)1.05221 × 10⁻¹¹ rd (US)
A.u. of Length to Link (US Survey)2.63052 × 10⁻¹⁰ li (US)
A.u. of Length to Fathom (US Survey)2.89357 × 10⁻¹¹ ftm (US)

Nautical

A.u. of Length to Nautical Mile (international)2.85733 × 10⁻¹⁴ NM
A.u. of Length to Nautical Mile (UK)2.8555 × 10⁻¹⁴ NM (UK)
A.u. of Length to Nautical League (int.)9.52443 × 10⁻¹⁵ NL
A.u. of Length to Nautical League (UK)9.51834 × 10⁻¹⁵ NL (UK)

Astronomical

A.u. of Length to Astronomical Unit3.53733 × 10⁻²² au
A.u. of Length to Light Year5.59341 × 10⁻²⁷ ly
A.u. of Length to Parsec1.71495 × 10⁻²⁷ pc
A.u. of Length to Kiloparsec1.71495 × 10⁻³⁰ kpc
A.u. of Length to Megaparsec1.71495 × 10⁻³³ Mpc

Atomic & physics

A.u. of Length to X-unit528.079 xu

Historical & cloth

A.u. of Length to Ell4.62972 × 10⁻¹¹ ell
A.u. of Length to Cubit (UK)1.15743 × 10⁻¹⁰ cubit
A.u. of Length to Span (cloth)2.31486 × 10⁻¹⁰ span
A.u. of Length to Finger (cloth)4.62972 × 10⁻¹⁰ finger
A.u. of Length to Nail (cloth)9.25944 × 10⁻¹⁰ nail
A.u. of Length to Barleycorn6.25012 × 10⁻⁹ barleycorn
A.u. of Length to League1.09605 × 10⁻¹⁴ lea
A.u. of Length to Arpent9.04243 × 10⁻¹³ arpent
A.u. of Length to Mile (Roman)3.576 × 10⁻¹⁴ m.p.

Typography

A.u. of Length to Pica1.25002 × 10⁻⁸ pc
A.u. of Length to Point1.50003 × 10⁻⁷ pt
A.u. of Length to Twip0.00000300006 twip

Convert other units to atomic units of length