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angstrom
Symbol:  Å 
Category:  Length 
SI Equivalent:  1×10-10 m
Dimension:  L 
 
Notes
Unit of wavelength employed in atomic and molecular physics. Named after the Swedish scientist A.J. Ångström (1814-1874), it is based on the wavelength of the emission spectra's red line of an atom of cadmium. The agreed numerical value is equal to l=6438.4696 Å in dry air which contains at maximum a volume fraction of carbon dioxide of 30x10-6, and measured under standard atmospheric pressure and at 10°C.
Convert     Å  
1 Å =
Length
  Symbol Unit Name
1.88973  a.u., a0, b  a.u. of length 
3.43775×10-7  arcmin  arcmin 
6.68459×10-22  AU, UA  astronomical unit 
10×107  am  attometer 
1.1811×10-8    barleycorn (UK) 
1.88973  a0, b  bohr (first Bohr radius) 
2.73403×10-12    bolt (US cloth) 
4.72441×10-8  line (UK)  button (UK) 
1.5748×10-7  line (US)  button (US) 
5.39957×10-13    cable length (int.) 
5.39612×10-13    cable length (UK) 
4.55672×10-13    cable length (US) 
3.93701×10-7  caliber, cin  caliber (centiinch) 
1×10-8  cm  centimeter 
3.28084×10-12  ch  chain (engineer's) 
4.97097×10-12  ch  chain (Gunter's) 
3.28084×10-12  ch  chain (Ramsden's) 
4.97097×10-12  ch  chain (surveyor's) 
2.18723×10-10    cubit (UK) 
1×10-11  dam  decameter 
10×10-10  dm  decimeter 
3.54869×104  re  electron classical radius 
8.74891×10-11    ell 
2.37107×10-8    ems (pica) 
1×10-28  Em  exameter 
5.46807×10-11  fath  fathom 
1×105  fm  femtometer 
1×105  F, f  fermi 
1.88973  a0, b, a.u.  first Bohr radius 
3.28084×10-10  ft  foot 
3×10-7  fr  French 
4.97097×10-13  fur  furlong (UK) 
4.97097×10-13  fur  furlong (US) 
1×10-19  Gm  gigameter 
9.84252×10-10  hd  hand (UK) 
1×10-12  hm  hectometer 
1.05702×10-35    hubble 
3.93701×10-9  in  inch 
1×10-13  km  kilometer 
3.24078×10-30  kpc  kiloparsec 
2.07168×10-14    league (Canadian) 
1.79986×10-14  leag. (int. naut.)  league (int. naut.) 
2.07124×10-14  leag. (stat.)  league (statute, land) 
1.79871×10-14  leag. (UK, naut.)  league (UK, naut.) 
1.79871×10-14  leag. (US, naut.)  league (US, naut.) 
3.8607×10-24    light-day 
9.26567×10-23    light-hour 
5.5594×10-21    light-minute 
3.33564×10-19    light-second 
1.05702×10-26  ly  light-year 
4.72441×10-8  line (UK)  line (UK) 
1.5748×10-7  line (US)  line (US) 
3.28084×10-10    link (engineer's) 
4.97097×10-10    link (Gunter's) 
3.28084×10-10    link (Ramsden's) 
4.97097×10-10    link (surveyor's) 
1×10-16  Mm  megameter 
1×10-10  m  meter 
3.93701×10-3  µin  microinch 
1×10-4  µm  micron 
3.93701×10-6  mil, thou  mil (thou) 
1.34742×10-14  mile (geogr.)  mile (geographical) 
6.2137×10-14  mi (int.)  mile (international) 
5.39957×10-14  mi (naut., int.)  mile (nautical, international) 
5.38991×10-14  mi (naut., teleg.)  mile (nautical, telegraph) 
5.39612×10-14  mi (naut., UK, US)  mile (nautical, UK, US) 
6.21371×10-14  mi (stat.)  mile (statute, land) 
6.2137×10-14  mi (survey, US)  mile (survey, US) 
10×10-8  mm  millimeter 
0.1  mµ, nm  millimicron 
4.37445×10-10    nail (UK) 
0.1  nm  nanometer 
5.39957×10-14  mi (int. naut.)  nautical mile (international) 
5.39612×10-14  mi (UK, US, naut.)  nautical mile (UK, US) 
1.31234×10-10    pace (UK) 
1.31234×10-9    palm (UK) 
3.24078×10-27  pc  parsec 
1.98839×10-11  rd  perch (rod, pole) 
1×10-25  Pm  petameter 
2.37106×10-8    pica 
100  pm  picometer 
2.84528×10-7    point (US printer's) 
1.98839×10-11  rd  pole (rod, perch) 
1×10-17    quadrant 
1.98839×10-11  rd  rod (perch, pole) 
1.64042×10-11    rope (UK) 
4.37445×10-10    span 
1×10-22  Tm  terameter 
3.93701×10-6  thou, mil  thou (mil) 
999.792  UX, X  X-unit 
1.09361×10-10  yd  yard 
10×1013  ym  yoctometer 
10×10-35  Ym  yottameter 
1×1011  zm  zeptometer 
10×10-32  Zm  zettameter 
Glossary
FREE Publications
3D Scanners

A white paper to assist in the evaluation of 3D scanning hardware solutions.

Mechanical Engineers Outlook

Guide for those interested in becoming a mechanical engineer. Includes qualifications, pay, and job duties.

Negotiate Your Salary

Learn the best principles to negotiate the salary you deserve!

STEM Career Outlook

Wages, employment opportunities, and growth projections for STEM jobs.

more publications