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atomic unit of mass (16O)
Symbol:  u, uma, Da(16O), AMU 
Category:  Mass 
SI Equivalent:  1.66001×10-27 kg
Dimension
 
Notes
Equals to 1/16 of the mass of the oxygen 16 atom.
Convert     u, uma, Da(16O), AMU  
1 u, uma, Da(16O), AMU =
Mass
  Symbol Unit Name
1822.31  m0, me  a.u. of mass (electron rest mass) 
5.69141×10-26    assay ton 
0.999682  u, uma, Da(12C), AMU  atomic unit of mass (12C) 
0.99192  u, uma, Da(1H), AMU  atomic unit of mass (1H) 
1.66001×10-6  ag  attogram 
9.99791×10-4    avogram 
3.8933×10-29    bag (UK, cement) 
8.30006×10-24  ct.  carat (metric) 
8.08985×10-24  ct (troy)  carat (troy) 
3.6597×10-29  cH, cwt  cental 
1.66001×10-22  cg  centigram 
0.999682  u, uma, Da  dalton (atomic unit of mass) 
1.66001×10-25  dag  decagram 
1.66001×10-23  dg  decigram 
4.26965×10-25  dr (troy)  dram (troy) 
4.26965×10-25  dr (ap.), dr (apoth.)  dram or drachm (apothecary) 
9.36883×10-25  dr (av.), dr (avdp)  dram or drachm (avoirdupois) 
1822.31  m0, me  electron rest mass (a.u. of mass) 
1.66001×10-42  Eg  exagram 
1.66001×10-9  fg  femtogram 
1.66001×10-18  g  gamma (mass) 
1.13747×10-28  slug  geepound (slug) 
1.66001×10-33  Gg  gigagram 
2.56179×10-23  gr (apoth.), gr (ap.)  grain (apothecary) 
2.56179×10-23  gr (avdp.), gr (av.)  grain (avoirdupois) 
2.56179×10-23  gr (troy)  grain (troy) 
1.66001×10-24  g  gram 
1.66001×10-26  hg  hectogram 
3.26759×10-29  cH, cwt, lg cwt  hundredweight (gross or long) 
3.6597×10-29  sh. cwt  hundredweight (net or short) 
3.26759×10-29  cwt (av.)  hundredweight (UK, avoirdupois) 
1.69274×10-28  Hyl, hyl  hyl 
1.66001×10-27  kg  kilogram 
3.6597×10-30  kip  kilopound (kip) 
2.82384×10-30    load (UK) 
1.74271×10-30    load (UK, wool) 
1.63379×10-30  lg ton (UK)  long ton (UK) 
1.66001×10-30  Mg  megagram 
1.69274×10-28  mug  metric slug (hyl) 
1.66001×10-18  µg  microgram 
1.66001×10-21  mg  milligram 
1.69274×10-28    MKpS unit of mass 
1.69274×10-28  mug  mug (hyl, metric clug, par, TME) 
1.66001×10-15  ng  nanogram 
5.33706×10-26  oz (apoth.), oz (ap.)  ounce (apothecary) 
5.85552×10-26  oz (advp.), oz (av.)  ounce (avoirdupois) 
5.33706×10-26  oz (troy)  ounce (troy) 
1.69274×10-28  par  par (hyl, mug, metric slug) 
1.06741×10-24  dwt (troy)  pennyweight (troy) 
1.66001×10-39  Pg  petagram 
1.66001×10-12  pg  picogram 
3.6597×10-27  lb  pound 
3.6597×10-27  lb (av.)  pound (avoirdupois) 
4.44755×10-27  lb (troy), lb (tr.)  pound (troy) 
6.0995×10-27  lb (UK, new hay)  pound (UK, new hay) 
5.69287×10-27  lb (UK, obsolete hay)  pound (UK, obsolete hay) 
3.6597×10-27  lb (UK, straw)  pound (UK, straw) 
3.6597×10-27  lb (US)  pound (US) 
1.30704×10-28    quarter (UK, mass) 
6.53518×10-30    quarter (US, long) 
7.3194×10-30    quarter (US, short) 
1.66001×10-29  q  quintal (metric) 
3.6597×10-29  quint. (US, UK)  quintal (US, UK) 
1.04563×10-29    sack (UK, weight) 
1.2809×10-24  s, scr (ap.)  scruple (UK, US, apoth.) 
1.82985×10-30  sh. Ton  short ton (US, ton) 
1.13747×10-28    slug (geepound) 
2.61407×10-28  st (UK)  stone (UK) 
2.92776×10-28  st (UK, wool)  stone (UK, wool) 
1.66001×10-36  Tg  teragram 
1.66001×10-30    ton (metric) 
1.63379×10-30  UK ton, lg ton  ton (UK, long) 
1.82985×10-30    ton (US, short) 
1.66001×10-30  t  tonne (metric) 
1.01658×10-28    truss 
1.66001  yg  yoctogram 
1.66001×10-48  Yg  yottagram 
1.66001×10-3  zg  zeptogram 
1.66001×10-45  Zg  zettagram 
Glossary
Selecting the Right 3D Printer

Discover how to choose the right 3D printer for your needs and the key performance attributes to consider.

CNC Machining Design Guide

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

Injection Molding Design Guide

Guide for high quality and cost-effective plastic injection molding.

Salary Expectation

8 things to know about the interview question "What's your salary expectation"?