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angstrom
Symbol:  Å 
Category:  Length 
SI Equivalent:  1×10-10 m
Dimension
 
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