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astronomical unit
Symbol:  AU, UA 
Category:  Length 
SI Equivalent:  1.49598×1011 m
Dimension:  L 
 
Notes
Equal to the mean distance between the earth and the sun, this unit of length is usually employed in astronomy for describing planetary distances. It was adopted by the International Astronomical Union in 1964.
Convert     AU, UA  
1 AU, UA =
Length
  Symbol Unit Name
2.82699×1021  a.u., a0, b  a.u. of length 
1.49598×1021  Å  angstrom 
5.1428×1014  arcmin  arcmin 
1.49598×1029  am  attometer 
1.7669×1013    barleycorn (UK) 
2.82699×1021  a0, b  bohr (first Bohr radius) 
4.09006×109    bolt (US cloth) 
7.06762×1013  line (UK)  button (UK) 
2.35587×1014  line (US)  button (US) 
8.07764×108    cable length (int.) 
8.07248×108    cable length (UK) 
6.81676×108    cable length (US) 
5.88968×1014  caliber, cin  caliber (centiinch) 
1.49598×1013  cm  centimeter 
4.90807×109  ch  chain (engineer's) 
7.43646×109  ch  chain (Gunter's) 
4.90807×109  ch  chain (Ramsden's) 
7.43646×109  ch  chain (surveyor's) 
3.27204×1011    cubit (UK) 
1.49598×1010  dam  decameter 
1.49598×1012  dm  decimeter 
5.30876×1025  re  electron classical radius 
1.30882×1011    ell 
3.54707×1013    ems (pica) 
1.49598×10-7  Em  exameter 
8.18011×1010  fath  fathom 
1.49598×1026  fm  femtometer 
1.49598×1026  F, f  fermi 
2.82699×1021  a0, b, a.u.  first Bohr radius 
4.90807×1011  ft  foot 
4.48794×1014  fr  French 
7.43646×108  fur  furlong (UK) 
7.43646×108  fur  furlong (US) 
149.598  Gm  gigameter 
1.47242×1012  hd  hand (UK) 
1.49598×109  hm  hectometer 
1.58128×10-14    hubble 
5.88968×1012  in  inch 
1.49598×108  km  kilometer 
4.84814×10-9  kpc  kiloparsec 
3.09919×107    league (Canadian) 
2.69255×107  leag. (int. naut.)  league (int. naut.) 
3.09853×107  leag. (stat.)  league (statute, land) 
2.69083×107  leag. (UK, naut.)  league (UK, naut.) 
2.69083×107  leag. (US, naut.)  league (US, naut.) 
5.77552×10-3    light-day 
0.138612    light-hour 
8.31675    light-minute 
499.005    light-second 
1.58128×10-5  ly  light-year 
7.06762×1013  line (UK)  line (UK) 
2.35587×1014  line (US)  line (US) 
4.90807×1011    link (engineer's) 
7.43646×1011    link (Gunter's) 
4.90807×1011    link (Ramsden's) 
7.43646×1011    link (surveyor's) 
1.49598×105  Mm  megameter 
1.49598×1011  m  meter 
5.88968×1018  µin  microinch 
1.49598×1017  µm  micron 
5.88968×1015  mil, thou  mil (thou) 
2.01571×107  mile (geogr.)  mile (geographical) 
9.29556×107  mi (int.)  mile (international) 
8.07764×107  mi (naut., int.)  mile (nautical, international) 
8.06319×107  mi (naut., teleg.)  mile (nautical, telegraph) 
8.07248×107  mi (naut., UK, US)  mile (nautical, UK, US) 
9.29558×107  mi (stat.)  mile (statute, land) 
9.29556×107  mi (survey, US)  mile (survey, US) 
1.49598×1014  mm  millimeter 
1.49598×1020  mµ, nm  millimicron 
6.54409×1011    nail (UK) 
1.49598×1020  nm  nanometer 
8.07764×107  mi (int. naut.)  nautical mile (international) 
8.07248×107  mi (UK, US, naut.)  nautical mile (UK, US) 
1.96323×1011    pace (UK) 
1.96323×1012    palm (UK) 
4.84814×10-6  pc  parsec 
2.97459×1010  rd  perch (rod, pole) 
1.49598×10-4  Pm  petameter 
3.54706×1013    pica 
1.49598×1023  pm  picometer 
4.25647×1014    point (US printer's) 
2.97459×1010  rd  pole (rod, perch) 
1.49598×104    quadrant 
2.97459×1010  rd  rod (perch, pole) 
2.45403×1010    rope (UK) 
6.54409×1011    span 
0.149598  Tm  terameter 
5.88968×1015  thou, mil  thou (mil) 
1.49567×1024  UX, X  X-unit 
1.63602×1011  yd  yard 
1.49598×1035  ym  yoctometer 
1.49598×10-13  Ym  yottameter 
1.49598×1032  zm  zeptometer 
1.49598×10-10  Zm  zettameter 
Glossary
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Negotiate Your Salary

Learn the best principles to negotiate the salary you deserve!

Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.

CNC Machining Design Guide

Optimize your designs, reduce machining time, and lower your costs.

STEM Career Outlook

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

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