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carat (metric)
Symbol:  ct. 
Category:  Mass 
SI Equivalent:  2×10-4 kg
Dimension
System:  INT 
 
Notes
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. 1 carat (metric) = 200 mg
Convert     ct.  
1 ct. =
Mass
  Symbol Unit Name
2.19554×1026  m0, me  a.u. of mass (electron rest mass) 
6.85706×10-3    assay ton 
1.20443×1023  u, uma, Da(12C), AMU  atomic unit of mass (12C) 
1.20481×1023  u, uma, Da(16O), AMU  atomic unit of mass (16O) 
1.19508×1023  u, uma, Da(1H), AMU  atomic unit of mass (1H) 
2×1017  ag  attogram 
1.20456×1020    avogram 
4.69069×10-6    bag (UK, cement) 
0.974673  ct (troy)  carat (troy) 
4.40925×10-6  cH, cwt  cental 
20  cg  centigram 
1.20443×1023  u, uma, Da  dalton (atomic unit of mass) 
2×10-2  dag  decagram 
dg  decigram 
5.14412×10-2  dr (troy)  dram (troy) 
5.14412×10-2  dr (ap.), dr (apoth.)  dram or drachm (apothecary) 
0.112877  dr (av.), dr (avdp)  dram or drachm (avoirdupois) 
2.19554×1026  m0, me  electron rest mass (a.u. of mass) 
2×10-19  Eg  exagram 
2×1014  fg  femtogram 
2×105  g  gamma (mass) 
1.37044×10-5  slug  geepound (slug) 
2×10-10  Gg  gigagram 
3.08647  gr (apoth.), gr (ap.)  grain (apothecary) 
3.08647  gr (avdp.), gr (av.)  grain (avoirdupois) 
3.08647  gr (troy)  grain (troy) 
0.2  g  gram 
2×10-3  hg  hectogram 
3.93683×10-6  cH, cwt, lg cwt  hundredweight (gross or long) 
4.40925×10-6  sh. cwt  hundredweight (net or short) 
3.93683×10-6  cwt (av.)  hundredweight (UK, avoirdupois) 
2.03943×10-5  Hyl, hyl  hyl 
2×10-4  kg  kilogram 
4.40925×10-7  kip  kilopound (kip) 
3.4022×10-7    load (UK) 
2.09964×10-7    load (UK, wool) 
1.96841×10-7  lg ton (UK)  long ton (UK) 
2×10-7  Mg  megagram 
2.03943×10-5  mug  metric slug (hyl) 
2×105  µg  microgram 
200  mg  milligram 
2.03943×10-5    MKpS unit of mass 
2.03943×10-5  mug  mug (hyl, metric clug, par, TME) 
2×108  ng  nanogram 
6.43015×10-3  oz (apoth.), oz (ap.)  ounce (apothecary) 
7.05479×10-3  oz (advp.), oz (av.)  ounce (avoirdupois) 
6.43015×10-3  oz (troy)  ounce (troy) 
2.03943×10-5  par  par (hyl, mug, metric slug) 
0.128603  dwt (troy)  pennyweight (troy) 
2×10-16  Pg  petagram 
2×1011  pg  picogram 
4.40925×10-4  lb  pound 
4.40925×10-4  lb (av.)  pound (avoirdupois) 
5.35846×10-4  lb (troy), lb (tr.)  pound (troy) 
7.34874×10-4  lb (UK, new hay)  pound (UK, new hay) 
6.85883×10-4  lb (UK, obsolete hay)  pound (UK, obsolete hay) 
4.40925×10-4  lb (UK, straw)  pound (UK, straw) 
4.40925×10-4  lb (US)  pound (US) 
1.57473×10-5    quarter (UK, mass) 
7.87365×10-7    quarter (US, long) 
8.81849×10-7    quarter (US, short) 
2×10-6  q  quintal (metric) 
4.40925×10-6  quint. (US, UK)  quintal (US, UK) 
1.25978×10-6    sack (UK, weight) 
0.154324  s, scr (ap.)  scruple (UK, US, apoth.) 
2.20462×10-7  sh. Ton  short ton (US, ton) 
1.37044×10-5    slug (geepound) 
3.14946×10-5  st (UK)  stone (UK) 
3.5274×10-5  st (UK, wool)  stone (UK, wool) 
2×10-13  Tg  teragram 
2×10-7    ton (metric) 
1.96841×10-7  UK ton, lg ton  ton (UK, long) 
2.20462×10-7    ton (US, short) 
2×10-7  t  tonne (metric) 
1.22479×10-5    truss 
2×1023  yg  yoctogram 
2×10-25  Yg  yottagram 
2×1020  zg  zeptogram 
2×10-22  Zg  zettagram 
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