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dalton (atomic unit of mass)
Symbol:  u, uma, Da 
Category:  Mass 
SI Equivalent:  1.66054×10-27 kg
Dimension
 
Notes
Named after J. Dalton (1766-1844), one dalton is equal to 1/12 of the mass of the carbon 12 atom.
Convert     u, uma, Da  
1 u, uma, Da =
Mass
  Symbol Unit Name
1822.89  m0, me  a.u. of mass (electron rest mass) 
5.69322×10-26    assay ton 
u, uma, Da(12C), AMU  atomic unit of mass (12C) 
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 
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