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atomic unit of mass (12C)
Symbol:  u, uma, Da(12C), AMU 
Category:  Mass 
SI Equivalent:  1.66054×10-27 kg
Dimension
 
Notes
Equals to 1/12 of the mass of the carbon 12 atom.
Convert     u, uma, Da(12C), AMU  
1 u, uma, Da(12C), AMU =
Mass
  Symbol Unit Name
1822.89  m0, me  a.u. of mass (electron rest mass) 
5.69322×10-26    assay ton 
1.00032  u, uma, Da(16O), AMU  atomic unit of mass (16O) 
0.992236  u, uma, Da(1H), AMU  atomic unit of mass (1H) 
1.66054×10-6  ag  attogram 
1.00011×10-3    avogram 
3.89454×10-29    bag (UK, cement) 
8.3027×10-24  ct.  carat (metric) 
8.09242×10-24  ct (troy)  carat (troy) 
3.66086×10-29  cH, cwt  cental 
1.66054×10-22  cg  centigram 
u, uma, Da  dalton (atomic unit of mass) 
1.66054×10-25  dag  decagram 
1.66054×10-23  dg  decigram 
4.27101×10-25  dr (troy)  dram (troy) 
4.27101×10-25  dr (ap.), dr (apoth.)  dram or drachm (apothecary) 
9.37181×10-25  dr (av.), dr (avdp)  dram or drachm (avoirdupois) 
1822.89  m0, me  electron rest mass (a.u. of mass) 
1.66054×10-42  Eg  exagram 
1.66054×10-9  fg  femtogram 
1.66054×10-18  g  gamma (mass) 
1.13783×10-28  slug  geepound (slug) 
1.66054×10-33  Gg  gigagram 
2.56261×10-23  gr (apoth.), gr (ap.)  grain (apothecary) 
2.56261×10-23  gr (avdp.), gr (av.)  grain (avoirdupois) 
2.56261×10-23  gr (troy)  grain (troy) 
1.66054×10-24  g  gram 
1.66054×10-26  hg  hectogram 
3.26863×10-29  cH, cwt, lg cwt  hundredweight (gross or long) 
3.66086×10-29  sh. cwt  hundredweight (net or short) 
3.26863×10-29  cwt (av.)  hundredweight (UK, avoirdupois) 
1.69328×10-28  Hyl, hyl  hyl 
1.66054×10-27  kg  kilogram 
3.66086×10-30  kip  kilopound (kip) 
2.82474×10-30    load (UK) 
1.74327×10-30    load (UK, wool) 
1.63431×10-30  lg ton (UK)  long ton (UK) 
1.66054×10-30  Mg  megagram 
1.69328×10-28  mug  metric slug (hyl) 
1.66054×10-18  µg  microgram 
1.66054×10-21  mg  milligram 
1.69328×10-28    MKpS unit of mass 
1.69328×10-28  mug  mug (hyl, metric clug, par, TME) 
1.66054×10-15  ng  nanogram 
5.33876×10-26  oz (apoth.), oz (ap.)  ounce (apothecary) 
5.85738×10-26  oz (advp.), oz (av.)  ounce (avoirdupois) 
5.33876×10-26  oz (troy)  ounce (troy) 
1.69328×10-28  par  par (hyl, mug, metric slug) 
1.06775×10-24  dwt (troy)  pennyweight (troy) 
1.66054×10-39  Pg  petagram 
1.66054×10-12  pg  picogram 
3.66086×10-27  lb  pound 
3.66086×10-27  lb (av.)  pound (avoirdupois) 
4.44897×10-27  lb (troy), lb (tr.)  pound (troy) 
6.10144×10-27  lb (UK, new hay)  pound (UK, new hay) 
5.69468×10-27  lb (UK, obsolete hay)  pound (UK, obsolete hay) 
3.66086×10-27  lb (UK, straw)  pound (UK, straw) 
3.66087×10-27  lb (US)  pound (US) 
1.30745×10-28    quarter (UK, mass) 
6.53726×10-30    quarter (US, long) 
7.32173×10-30    quarter (US, short) 
1.66054×10-29  q  quintal (metric) 
3.66086×10-29  quint. (US, UK)  quintal (US, UK) 
1.04596×10-29    sack (UK, weight) 
1.2813×10-24  s, scr (ap.)  scruple (UK, US, apoth.) 
1.83043×10-30  sh. Ton  short ton (US, ton) 
1.13783×10-28    slug (geepound) 
2.6149×10-28  st (UK)  stone (UK) 
2.92869×10-28  st (UK, wool)  stone (UK, wool) 
1.66054×10-36  Tg  teragram 
1.66054×10-30    ton (metric) 
1.63431×10-30  UK ton, lg ton  ton (UK, long) 
1.83043×10-30    ton (US, short) 
1.66054×10-30  t  tonne (metric) 
1.01691×10-28    truss 
1.66054  yg  yoctogram 
1.66054×10-48  Yg  yottagram 
1.66054×10-3  zg  zeptogram 
1.66054×10-45  Zg  zettagram 
Glossary
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A white paper to assist in the evaluation of 3D scanning hardware solutions.

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

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Direct Metal Laser Sintering (DMLS) 3D printing for parts with reduced cost and little waste.