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Convert A.U. of Length (a.u.) to Span (Cloth) (span) instantly.

About these units

A.U. of Length (a.u.)

The atomic unit of length, also known as the Bohr radius unit in atomic units, is approximately 5.29177 × 10⁻¹¹ meters. It is defined as the radius of the lowest-energy orbital of the hydrogen atom, providing a natural scale for describing atomic and quantum mechanical systems. Atomic units were devised to simplify equations in quantum chemistry and atomic physics by normalizing fundamental constants such as electron charge, Planck's constant, and electron mass to 1. In this system, many equations become dimensionless and far easier to manipulate mathematically. The atomic unit of length is essential in molecular orbital calculations, quantum simulations, and the study of electron behavior in atoms and molecules. Its use reflects an approach to physics in which units are chosen to match the natural scales of the systems being studied.

Span (Cloth) (span)

The span is a unit traditionally used in textile measurement, equal to the distance between the tip of the thumb and the tip of the little finger when the hand is fully extended, approximately 22.86 cm (9 inches). This anthropometric unit was widely used by weavers and cloth merchants to measure lengths of fabric quickly and intuitively. Its small scale made it convenient for practical applications where tape measures or rulers were unavailable. The span also appears in cultural and historical texts as a natural unit of human proportion. While largely obsolete today, it offers insight into pre-industrial textile practices and the anthropometric basis of early measurement systems.

More A.U. of Length converters

A.U. of Length [a.u.] ↔ Meter [m]
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A.U. of Length [a.u.] ↔ Kilometer [km]
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A.U. of Length [a.u.] ↔ Centimeter [cm]
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A.U. of Length [a.u.] ↔ Millimeter [mm]
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A.U. of Length [a.u.] ↔ Mile [mi]
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A.U. of Length [a.u.] ↔ Foot [ft]
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A.U. of Length [a.u.] ↔ Inch [in]
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A.U. of Length [a.u.] ↔ Yard [yd]
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A.U. of Length [a.u.] ↔ Nautical Mile [nmi]
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A.U. of Length [a.u.] ↔ Micrometer [µm]
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A.U. of Length [a.u.] ↔ Attometer [am]
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A.U. of Length [a.u.] ↔ Femtometer [fm]
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A.U. of Length [a.u.] ↔ Picometer [pm]
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A.U. of Length [a.u.] ↔ Nanometer [nm]
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A.U. of Length [a.u.] ↔ Decimeter [dm]
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A.U. of Length [a.u.] ↔ Dekameter [dam]
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A.U. of Length [a.u.] ↔ Hectometer [hm]
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A.U. of Length [a.u.] ↔ Megameter [Mm]
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A.U. of Length [a.u.] ↔ Gigameter [Gm]
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A.U. of Length [a.u.] ↔ Terameter [Tm]
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A.U. of Length [a.u.] ↔ Petameter [Pm]
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A.U. of Length [a.u.] ↔ Exameter [Em]
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A.U. of Length [a.u.] ↔ Mil [mil]
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A.U. of Length [a.u.] ↔ Hand [hand]
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A.U. of Length [a.u.] ↔ Fathom [fath]
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A.U. of Length [a.u.] ↔ Rod [rd]
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A.U. of Length [a.u.] ↔ Chain [ch]
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A.U. of Length [a.u.] ↔ Furlong [fur]
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A.U. of Length [a.u.] ↔ League [lea]
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A.U. of Length [a.u.] ↔ Nautical Mile (UK) [NM (UK)]
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A.U. of Length [a.u.] ↔ Nautical League (Int) [nl (int)]
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A.U. of Length [a.u.] ↔ Nautical League (UK) [nl (UK)]
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A.U. of Length [a.u.] ↔ Astronomical Unit [AU]
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A.U. of Length [a.u.] ↔ Light Year [ly]
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A.U. of Length [a.u.] ↔ Parsec [pc]
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A.U. of Length [a.u.] ↔ Kiloparsec [kpc]
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A.U. of Length [a.u.] ↔ Megaparsec [Mpc]
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A.U. of Length [a.u.] ↔ Angstrom [Å]
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A.U. of Length [a.u.] ↔ X-unit [X]
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A.U. of Length [a.u.] ↔ Planck Length [ℓₚ]
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A.U. of Length [a.u.] ↔ Electron Radius [re]
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A.U. of Length [a.u.] ↔ Bohr Radius [a₀]
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A.U. of Length [a.u.] ↔ Point [pt]
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A.U. of Length [a.u.] ↔ Pica [pica]
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A.U. of Length [a.u.] ↔ Twip [twip]
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A.U. of Length [a.u.] ↔ Aln [aln]
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A.U. of Length [a.u.] ↔ Famn [famn]
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A.U. of Length [a.u.] ↔ Caliber [cl]
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A.U. of Length [a.u.] ↔ Centiinch [cin]
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A.U. of Length [a.u.] ↔ Ken [ken]
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A.U. of Length [a.u.] ↔ Russian Archin [archin]
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A.U. of Length [a.u.] ↔ Roman Actus [actus]
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A.U. of Length [a.u.] ↔ Vara de Tarea [vara de tarea]
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A.U. of Length [a.u.] ↔ Vara Conuquera [vara conuquera]
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A.U. of Length [a.u.] ↔ Vara Castellana [vara castellana]
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A.U. of Length [a.u.] ↔ Cubit (Greek) [cubit (greek)]
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A.U. of Length [a.u.] ↔ Long Reed [long reed]
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A.U. of Length [a.u.] ↔ Reed [reed]
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A.U. of Length [a.u.] ↔ Long Cubit [long cubit]
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A.U. of Length [a.u.] ↔ Handbreadth [handbreadth]
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A.U. of Length [a.u.] ↔ Fingerbreadth [fingerbreadth]
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A.U. of Length [a.u.] ↔ Ell [ell]
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A.U. of Length [a.u.] ↔ Cubit (UK) [cubit (uk)]
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A.U. of Length [a.u.] ↔ Span (Cloth) [span]
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A.U. of Length [a.u.] ↔ Finger (Cloth) [finger]
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A.U. of Length [a.u.] ↔ Nail (Cloth) [nail]
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A.U. of Length [a.u.] ↔ Barleycorn [barleycorn]
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A.U. of Length [a.u.] ↔ Microinch [µin]
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A.U. of Length [a.u.] ↔ Arpent [arpent]
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A.U. of Length [a.u.] ↔ Kiloyard [kyd]
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A.U. of Length [a.u.] ↔ Foot (US Survey) [ft (US)]
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A.U. of Length [a.u.] ↔ Inch (US Survey) [in (US)]
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A.U. of Length [a.u.] ↔ Chain (US Survey) [ch (US)]
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A.U. of Length [a.u.] ↔ Furlong (US Survey) [fur (US)]
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A.U. of Length [a.u.] ↔ Rod (US Survey) [rd (US)]
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A.U. of Length [a.u.] ↔ Fathom (US Survey) [fath (US)]
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A.U. of Length [a.u.] ↔ Mile (US Survey) [mi (US)]
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A.U. of Length [a.u.] ↔ League (Statute) [st.league]
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A.U. of Length [a.u.] ↔ Mile (Roman) [mi (Roman)]
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A.U. of Length [a.u.] ↔ Earth's Equatorial Radius [R⊕]
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A.U. of Length [a.u.] ↔ Earth's Polar Radius [R⊕ (p)]
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A.U. of Length [a.u.] ↔ Earth's Distance from Sun [AU (es)]
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A.U. of Length [a.u.] ↔ Sun's Radius [R☉]
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Convert A.U. of Length to Span (Cloth)