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carat (troy)
Symbol:  ct (troy) 
Category:  Mass 
SI Equivalent:  2.05197×10-4 kg
Metric unit of mass employed in the jewelry industry for weighing precious metals and precious stones. Carat is derived from the Sanskrit word 'quirrat', the seeds of the carob tree which were used to weigh precious metals due to their small sizes and uniformity in weight.
Convert     ct (troy)  
1 ct (troy) =
  Symbol Unit Name
2.25259×1026  m0, me  a.u. of mass (electron rest mass) 
7.03525×10-3    assay ton 
1.23572×1023  u, uma, Da(12C), AMU  atomic unit of mass (12C) 
1.23612×1023  u, uma, Da(16O), AMU  atomic unit of mass (16O) 
1.22613×1023  u, uma, Da(1H), AMU  atomic unit of mass (1H) 
2.05197×1017  ag  attogram 
1.23586×1020    avogram 
4.81257×10-6    bag (UK, cement) 
1.02598  ct.  carat (metric) 
4.52382×10-6  cH, cwt  cental 
20.5197  cg  centigram 
1.23572×1023  u, uma, Da  dalton (atomic unit of mass) 
2.05197×10-2  dag  decagram 
2.05197  dg  decigram 
5.27779×10-2  dr (troy)  dram (troy) 
5.27779×10-2  dr (ap.), dr (apoth.)  dram or drachm (apothecary) 
0.11581  dr (av.), dr (avdp)  dram or drachm (avoirdupois) 
2.25259×1026  m0, me  electron rest mass (a.u. of mass) 
2.05197×10-19  Eg  exagram 
2.05197×1014  fg  femtogram 
2.05197×105  g  gamma (mass) 
1.40605×10-5  slug  geepound (slug) 
2.05197×10-10  Gg  gigagram 
3.16667  gr (apoth.), gr (ap.)  grain (apothecary) 
3.16667  gr (avdp.), gr (av.)  grain (avoirdupois) 
3.16667  gr (troy)  grain (troy) 
0.205197  g  gram 
2.05197×10-3  hg  hectogram 
4.03912×10-6  cH, cwt, lg cwt  hundredweight (gross or long) 
4.52382×10-6  sh. cwt  hundredweight (net or short) 
4.03912×10-6  cwt (av.)  hundredweight (UK, avoirdupois) 
2.09243×10-5  Hyl, hyl  hyl 
2.05197×10-4  kg  kilogram 
4.52382×10-7  kip  kilopound (kip) 
3.4906×10-7    load (UK) 
2.1542×10-7    load (UK, wool) 
2.01956×10-7  lg ton (UK)  long ton (UK) 
2.05197×10-7  Mg  megagram 
2.09243×10-5  mug  metric slug (hyl) 
2.05197×105  µg  microgram 
205.197  mg  milligram 
2.09243×10-5    MKpS unit of mass 
2.09243×10-5  mug  mug (hyl, metric clug, par, TME) 
2.05197×108  ng  nanogram 
6.59724×10-3  oz (apoth.), oz (ap.)  ounce (apothecary) 
7.23811×10-3  oz (advp.), oz (av.)  ounce (avoirdupois) 
6.59724×10-3  oz (troy)  ounce (troy) 
2.09243×10-5  par  par (hyl, mug, metric slug) 
0.131945  dwt (troy)  pennyweight (troy) 
2.05197×10-16  Pg  petagram 
2.05197×1011  pg  picogram 
4.52382×10-4  lb  pound 
4.52382×10-4  lb (av.)  pound (avoirdupois) 
5.4977×10-4  lb (troy), lb (tr.)  pound (troy) 
7.5397×10-4  lb (UK, new hay)  pound (UK, new hay) 
7.03705×10-4  lb (UK, obsolete hay)  pound (UK, obsolete hay) 
4.52382×10-4  lb (UK, straw)  pound (UK, straw) 
4.52382×10-4  lb (US)  pound (US) 
1.61565×10-5    quarter (UK, mass) 
8.07825×10-7    quarter (US, long) 
9.04764×10-7    quarter (US, short) 
2.05197×10-6  q  quintal (metric) 
4.52382×10-6  quint. (US, UK)  quintal (US, UK) 
1.29252×10-6    sack (UK, weight) 
0.158334  s, scr (ap.)  scruple (UK, US, apoth.) 
2.26191×10-7  sh. Ton  short ton (US, ton) 
1.40605×10-5    slug (geepound) 
3.2313×10-5  st (UK)  stone (UK) 
3.61906×10-5  st (UK, wool)  stone (UK, wool) 
2.05197×10-13  Tg  teragram 
2.05197×10-7    ton (metric) 
2.01956×10-7  UK ton, lg ton  ton (UK, long) 
2.26191×10-7    ton (US, short) 
2.05197×10-7  t  tonne (metric) 
1.25662×10-5    truss 
2.05197×1023  yg  yoctogram 
2.05197×10-25  Yg  yottagram 
2.05197×1020  zg  zeptogram 
2.05197×10-22  Zg  zettagram